Naw it's done all the time; that's what the thing is for actually. Just don't get into like a car wreck while it's really full cause it could burst if impacted to hard. Also if it's not been trained to hold to max, you might find the desire to pee more often for a few days while the holding muscle gets its strength back. Sort of like weight lifting; if your not in shape you will be sore for a few days after a hard lift.
What are the contest rules? Is it a "no hands or fingers allowed" to assist holding ?
Hands or fingers? What for?
He wants us to wear white panties that are kind of sheer and matching tops. We both pee at the start and then drink 1 oz of water, then 1 oz of beer 2 minutes later and repeat every 2 minutes. We just go about our business, cards, whatever. We keep drinking until someone wets themself. Whoever loses has to do a penalty. They won't say what that will be but the loser will have to draw an envelop from several and do what it says.
Just some rules; there has to be some rules. Like are you allowed to use your hands or fingers to help hold back the flood, or what about a small spirt, does that make the other the winner or must it be a major flood.