Oh, and about the clichés:
1) That would be Ryouga, who transforms into a piggy, but it's not for touching breasts. The girl he likes doesn't know it's him and took him as a sort of pet. And sometimes she holds him and hugs the pig... it's not something on purpose.
2) About that one, yes... there's an old perv, and he's so disgusting... -_-U