Attitude Gentlemen: What makes Tina more fun is attitude. While Amy who I'm guessing is ticklish would put up with her feet getting attention. Tina actually believes you belong at her feet giving them attention.
@Toe Yeah, I think you're right, but at the same time, even though I feel like Amy's feet are probably better, I feel like I'd have more fun worshiping Tina's instead. Something about Tina's personality/public image just makes it seem like that'd be a real enjoyable time, y'know?