An idea I've been cooking with for a while but, what do you think of the idea of siphon inflation Example: One person is inflated and is very proud of how big they are, next thing you know there is another person who is more inflated than they are. So in an act of jealousy the sneak up on the bigger person, surprise them with a kiss on the lips but then they start to forcibly suck all the air out of their victim making them twice as big and inflated while the other person is returned to their normal non-inflated self or are completely deflated until they're flat.