Three universities took part in a project to ascertain why a man has a knob at the end of his penis.

Oxford University, spent more than 5000 and decided using educated logic, that the knob was there to give the woman pleasure.

Edinburgh University, spent approximately 1000 and decided, with limited resources, that the knob was there to give the man pleasure.

Trinity College Dublin, with limited funds, took a professor and three biology students to a local pub, where they decided that the reason for the knob at the end of the mans' penis, was to prevent his hand from flying off the end.