And just to satisfy my curiosity...
You're in a relationship with an INFP that's managed to catch your interest. You and your friends go out to Vegas for a crazy-ass bachelor party for one of your friends. You drink a lot, you gamble a lot, and there are hot girls/guys all around.
Would you (and be honest) enjoy the hot girls/guys (if not sex, then what?) as much as you enjoy the other two mediums of entertainment? Especially if there's no way your boyfriend/girlfriend would find out? Or would that matter at all?
If you were engaged?