Bachelor Party (1985)

Patchy comedy about a wild party for a soon-to-be-married young man played with moderate charm by Tom Hanks.

Aside from Hanks' likable presence, the film features an array of sleazy characters who instigate various vulgar sex escapades laced with the usual assortment of scatological jokes.

There's a bit of high-minded philosophising amid the degenerate shenanigans: will the recipient of this bash remain pure and faithful to his bride? 

Tawny Kitaen and Adrian Zmed co-star.