I know this isn’t a fun one and I know I’ve said similar stuff, but wear a fucking condom. Do you realize how many people have STDs? I know people who have them and STILL have one night stands. If you want to have one night stands, have at it. But wear a condom. You can no clue what you’re getting into.
Seriously, don’t. The wedding is about the bride and groom, so don’t ruin their day just because you’re in the lovey-dovey spirit. I also know of girls who would be super embarrassed if you did it, so you just might get no for an answer.