Lmfao, how do I hide my erection?

So, im gonna be at a pool party with guys and girls. I know the girls are going to be SMOKING hot. And im gonna most likely get hard. Heck, I get hard in class talking to a girl! Thing is, I cant hide it in swim trunks... Or, can I?... Anyway, my penis kinda, springs if you will... And its hard to hide it... And I know its like, oh think of sports or guns. I cant! Im too focused on Abbie's bulging a$s!