
Incredibly in depth review at Movies About Girls. I reposted one video below...NSFW!!!!
And here's the sequel, Takin' it All Off

Bachelor Party is a 1984 comedy film starring Tom Hanks, Tawny Kitaen, Adrian Zmed, Robert Prescott, and Deborah Harmon, directed by Neal Israel. The original music score was composed by Robert Folk.
In the film, party-animal Rick Gassko (Hanks) deciding to settle down and marry his girlfriend Debbie Thompson (Kitaen) and his friends throw him one final debauchery-laden bash. Debbie suspects Rick of future cheating on her at the bash and, with the help of his friends' spouses, hatches a plan to catch him in the act.
A notorious scene in the film involves a quaalude-popping, cocaine-snorting donkey who dies of a drug overdose. * "Shocking, shameless, sinful, wicked. And the party hasn't even started." * "A man's tradition every woman should know about." * "Gentlemen... start your boners."