normaly we where born out of love , we grow up there are many many happening in a life of a human being,from born till dead we realize about our very first sex experience first started with feelings.
depends which age also on many situations it can be when we are very very young, a child so innocent and unconcious, the understanding however grows when we develope our selves and we realize we even take decisions and first step, to go beyong borders and restriction we feel, excitements and many more.
to makes things short and clear the difference is about how you lived your life , how u get educated and experiented, love is in allwe say, do, think, in our sleeping , our all of life, we are related to ourself and this world thats called love.
sex however is a very deep normal sweet exited feeling in us and depends on the individual and our partner[s] some said it is in our gene,s , brains, heart, body, blood, flesh.
i know from myself there are allways opposites.

try to figure out and find deeper answers in your self explore and maybe another understands u more than u yourself.
we are absolutely not equal