My gross-out thing isn't nearly as bad as some of these! It's our fish. We have a way of feeding them where we dip a little jar into the tank to get some water, and in this water we pre-soak their food (the pellets are a bit big for them to digest properly and soaking them helps). When I open the top and dip the jar in I yell, "Don't touch me! Don't touch me!" but they always do anyway, butting their wet, warm, and fish-scaly heads up against my hand. I guess it's their way of saying hello.