Tony the Tiger is definitely the most shaggable of the cereal mascots, hands down, although I'm sure there's a proportion of filth on here who prefer the diabetic balding bear that is the Sugar Monster. I'm not saying I wouldn't after a few strong G&Ts, and he's obviously preferable to the Coco Pops Monkey and the Weetos professor.
All that being said, the Cadbury's Caramel bunny is probably the cause of mine, and many other's, first erection. Which doesn't really trouble me as MUCH as it SHOULD.