What are some gross jokes?

We are not allowed to get too gross on here, but here are some that might be acceptable:

Q: What is worse than finding a worm inside your Apple?

A: Finding only half of a worm.

Q: How do you know you haven't cleaned your refrigerator in ages?

A: The food has more hair than you do.

I only tasted escargot twice. Once on the way down...