Because they're funny on many levels.
Crude Oil.
Don't worry! They will tell you!
Two. One to post the joke and one to post a better punchline in the comments.
A: Miscarriage This joke never gets old, just like the baby.
A nun with a javelin through her neck.
A cantelopez! Came up with this on all by myself. I'm a new Dad, so I feel as if I've significantly leveled up my Dad Joke ability.