STD

If you want my ex girlfriend, she's up for grabs.
But if you sleep with her, you will get the Crabs.
It's possible that you may get Herpes too.
Sleeping with her is a stupid thing to do.
I caught her in bed with my cousin and I thumped her.
She sleeps with a lot of men, that's why I dumped her.
I'm giving you valuable advice so you'd better listen to me.
If you seduce my ex girlfriend, you are sure to get an STD.

(This is a fictional poem)