If there was a monarchy to 1980's sex comedies then Bachelor Party would be their king. This is probably one of the crudest and tasteless films outside of the porno industry ever made, but it's still funny and entertaining as hell.
Oscar Winner Tom Hanks stars as Rick, a guy about to get married to Debbie (Tawny Kitaen). His buddies want to throw him a massive bachelor party that turns into a circus featuring a stripper trying to have sex with a donkey (who's hyped up on drugs) and an excursion to Chippendales to play a prank on the bridal shower by having a freakishly large version of the male anatomy in a hot dog bun.
Bachelor Party is good, tasteless humor that may offend some people out there, but most will find it hilarious. Yes, some of Tom Hanks schtick does get old after awhile buy overall the film is a pretty good romp.