Is there anything that you steer away from drawing when doing comics for Sipshine?

I'm not sure if I can come up with an interesting answer to this, oddly enough. There are plenty of things I plain won't do either because I'm opposed to it, or there's enough of it out there already. But nothing that I have to stop myself from drawing springs to mind.

So I'm just gonna say "tractors" because you can get gonorrhea from tractors.