My hairless crested thinks that sitting on the 'throne' means an empty lap to jump in. He just started doing this after 7yrs. Oh and he knows how to open the door too! There are 2 other females in the house and I'm the only one he does this to. On a side note after 35 years my DH finally stopped leaving the toilet seat up after my then 3 yr old DGD duct taped the seat down and sternly warned him about tiny butts falling into the toilet. (It's a waste of good hot water when you have to have a shower cause you fell in the toilet)