Just got dared to stick a baseball bat in my hoo-haa, but scared it might stretch me and make me loose?

Will my hoo-haa stretch and go back to it's natural tightness if I stick a baseball bat up in it or will I stay loose? It is an aluminum baseball bat and my brother's friend is daring me to do it so I really should do it or else I gotta leave the party and since I live here and my friend is on vacation, I will have to sleep in the yard if I don't do it. What to do?