What if the other one likes to get up real early and go to bed on time and you like to sleep in and go to bed late? (or vice versa).
So your biological rhythms are totally different. How would that affect your relationship?

People easily say "I don't care" but think about it:
breakfast together will probably never happen, watching a movie together late at night won't either.
The early bird will be active, chirpy and at his best in the (early) morning while you're still sipping your coffee trying to get your eyes open and your brain to clear up --> you're at your best later in the evening. So you like to be active when he's about to pass out ...

Would you really not care about such a difference?

Time apart is good for you!

I think it's possible to work around it. I'm a bit of a mixed bag - I stay up late but I get up early. My ex would often like to doze for a little while in the morning, so I used to pull the laptop into bed and write for a while - we were still together, just doing different things.

My mum stays up late, my stepdad gets up early. They still spend time together before he goes to bed, and he takes a cup of tea up to her before he leaves for work. It doesn't seem to be a problem for them. They spend Sunday breakfast together though.

It would affect me, yeah. I've never been a morning person, so I can't stand it when anyone smile's at me and looks all smug. lol. I tend to wake up more around lunchtime.

Don't bet on it. I can be very flexible ;)

I have dealt with this and it is a bigger problem than what people realize. It is hard to share activities with someone who refuses to do anything in the early morning or late at night. In the throes of romance it deosn;t seem a problem. But when a couple settles in, it starts to become a petty annoyance....eventually resetment can build up because he will never go on those early morning walks with you, or he and his late night buddies are always keeping you awake, etc...

You start to ask yourself why he'd rather be out with a bunch of drunks than in a cozy bed with you,,,and that's not it. It's just that he's a night person....but after awhile...it's starts to seem like the former (neglect)

and he is thinking you hate his friends when really you are simply tired


so yes, it can be a problem.

I'll get up in the morning if I have something to get up for. I never really eat anything until lunchtime though.

Did have a bit of a problem with one girlfriend wanting to go to sleep before midnight sometimes, which left me lying there bored until she woke up again in the middle of the night.

I've never actually lived with somebody though and it's never really been a problem. I don't really mind when they want to call me. I don't usually feel like sleeping when I have female company. Also, it's quite nice to go out in the morning occasionally when I'm seeing them to their bus stop.

But yeah, I think that it could become more of a problem when you become older. My mum used to stay with me sometimes and she always gets up really early. It can be a bit annoying when you're watching TV or something and they keep falling asleep, especially if they snore.

Exactly. I think most ppl tend to underestimate this. I've never been there myself with my partners, but I'm a night person, if I'd end up with a partner who liked to get up at 7 (or maybe even earlier), and do activities in the morning, sod that! LOL.
I usually need till lunch-ish to be really 'present' and I can be very active late in the evening.
I'd have a hard time with someone with different biological rhythm.

Hmmm, well the krupa works graveyard, while I am sleeping,
then he sleeps when I am awake.

Needs must, works fine :-)

Like every relationship, some things work...some things don't. It depends on the combination.
Things that could make it work:
(a) The non-morning person could have their "breakfast" while eating lunch with the non-morning person.
(b) The non-morning person who has the energy later could make an evening better for the early-riser who can help to compensate for that...I'm thinking along the line of doing nice things like having the extra energy to make a special meal (I have only known babies or toddlers who have fallen asleep during a meal), or slippers or a treat from the fridge or anything that is nice that the early riser might just not have the energy to do that little "extra" for themself.
(c) The early riser gets to get out and have some "me" time, which can be a good thing in a relationship.
(d) Since most people have jobs, and weekends seem to be their only free or go out time, I would think that two people could work on getting up a little earlier to go do something, or stay out a little past the bed time to enjoy each other's company once in a while. But hey, like I said in (a), brunch works for me, it's a break-time for the early riser and a great start to the rest of the day for me

well aren't you a little ray of sunshine in the morning. You'd hate me,you'd
Wake up to me singing at the table or carrying
on a conversation with myself, in and out of
the bedroom trying to sex ya while you sleep.

Hi shy where ya bin hidin' ?

If it were me, you'd only try that once
At night, okay, in the morning, no-go. I'm really not a morning person, which includes sex.

Yeah I have a lot of experience with these incompatibilities. If I have a stretch of time
off in a new relationship, I can get comfortable with her and sleep in with her but after the 'honeymoon' they liked to sleep to late and I may have a 5:30am
routine,so it can be hard on things,lots of extra
fighting because she's sleeping or wants to sleep late on your time off, or if I can't stay a wake in the early evening from a hard days work and
she wants company because she's spends more time
alone.Or your ready for bed at 8-10 but she wont
come in but constantly wakes you up when she
comes in for sex. At times I was glad I could sleep a couple hours first but other times when I was not
completely thrashed,she was content where she was
for a while, but then would wake me cus "canookie wanna nooki" or in this case she was one of my border beavers then it would be more like "Yankee want a spankie

No it will not work. constantly waking your partner up will grow old REAL quick. This works both way. He goes to bed late disturbing her when she has to get up in a little while to go to work. She gets up early and disturbs him just getting to sleep. Arguments will pursue.

When people say you'll regret that in the morning, just sleep til noon problem solved