soggy biscuit. 
Many variations, but the main point is to masturbate and ejaculate
on the biscuit. the last person to do so must eat cum filled
biscuit(s) as a penalty.
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Brotherhood of the soggy biscuit
Males only. Each male will be given a biscuit (or a slice of bread)
and they will have to masturbate until they ejaculate on it.
The last one to do so will have to eat the biscuit. In the extreme
version, he'll have to eat all the other competitor's cum filled
biscuits/bread too.
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Cheerleader soggy biscuit
A male and female per team. Likewise, the male of each team will be
given a biscuit (or slice of bread) and do his thing.
However, his female partner can whisper encouraging words into his
ears and/or strip (or do anything that doesn't involve physical
contact) for him to make him cum faster.
The rule is that there can NO PHYSICAL CONTANCT between the male or
female of that team.
The last male to cum will have to share his biscuit/bread with his
female partner.
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There are many more ways to play this game, such as handjob soggy
biscuit etc. just be creative!
