In some SMBD play, saran wrap is used. It can get extremely hot a sweaty inside and you never know whether the top is going to cut off the air or not. In safe play the bottom has a way to signal the end but with wrapping a guy like that they lose the ability to signal so this would never be considered to be safe sane or consensual.
Just remember, Meatpie, if you allow one CDG member to suck on your pecs, all the other members are going to feel entitled to a turn as well. It would probably be best not to start at all. You don't want to spend the rest of your days having your nipples licked by 48,000 guys.