i need really goood party games?

okay so im haivng a party and i need some really goooooood games. me and my friends are craaazy. we like to drink, go skinny dipping, and do anything crazy. i need really fun games to keep us up all night and day long. pleeeaaassse help me.

Skinny dipping ?

3 guys 4 girls would it be wierd if my sister came? (making it 5 girls) In our pool in our backyard with 4’6” fence. When is it the most fun to go? What’s fun games to play?