I'm wondering if things that are considered signs of a good lover (lasting long in bed, having a big penis) has been the same historically? If someone happens to know how different cultures approach this I'd be interested in that too.
I'm not a historian, but I am an amateur Latinist who has read Ovid. From the Ars Amatoria (which, incidentally, is a great read if you're ever looking for some bawdy Roman poetry):
Sed neque tu dominam velis maioribus usus
Desere, nec cursus anteat illa tuos
Ad metam properate simul: tum plena voluptas,
Cum pariter victi femina virque iacent.
Which translates roughly (I'm translating neither poetically nor literally) as:
You should neither desert your lover with too much wind in your sails
nor should she race ahead of you.
You should strive to climax at the same time: that's the greatest pleasure
when a man and a woman lie together, exhausted.
I can't speak to longevity in bed, but here are some links from previous questions regarding penis size you might find interesting:
http://www.reddit.com/r/AskHistorians/comments/268j4q/why_do_grecoroman_sculptures_of_men_have_such/
http://www.reddit.com/r/AskHistorians/comments/xfcnu/why_do_greek_and_roman_statues_especially_the/