I hope I won't forget but these are the funniest sexual comedy movies (recent ones) not in specific order:
40 year old virgin
40 days and 40 nights
American Pie
American Wedding
American Pie beta house- Naked mile
American Pie band camp
Austin Powers
A guy thing
Borat
Old School
Saved
There is something about Marry
He said she said
Wedding Crasher
Meet the fockers
Meet the parents