"I think that there's never a bad time to let someone know that the ass is off the table."
That means NOW is a good time to say... constant anal sex references are tiresome. If that's all you've got, you're not very clever or amusing. I don't know about anyone else, but I've had enough.
Poop jokes demand the proper context. For instance, flinging poop at worthy subjects can be funny. Pooping on people or things that deserve it can, as well. But poop descriptions or discussing how or where or when you pooped is as funny as a fart joke. Remember what happened to the fart joke guy?
I'm not trying to say that I haven't run out of material, or never missed the mark with my humor. I'm just pleading for some diversity in bloggertainment.