So far, other than the more normal stuff, I have written:
ragdoll/cloth toad sex,
inappropriate thoughts about a dog,
plant porn (giant mutated evil plant porn - Jayce and the Wheeled Warriors)
and now I have just written sex between beings made of plasticine (Morph -
I haven't written Disney porn yet; could that be considered the ultimate scaring of childhood memories? I think someone did that the other year though ... or maybe that was just the fairytales ;).
MMOM really is so much fun.