nah. My wife is about 6 inches shorter than me and a proper girl. If I even nudge her when I walk past her she goes 'OW!'.
I guess she could cut my todger off while I sleep which would slow me down for a bit but really, no.
I've been out with a girl who was well into her gym work. She had this iron hard stomach which I'd rub my hand over at night while she slept. It was proper hard with slight bulges over her stomach muscles. She was a fantastic girl, really direct and confident. Very bright too. I think I might still be quite keen on her, twenty years after going out with her.
Now she liked to playfight and she was very strong, but even then (I was into martial arts and weight lifting at the time), her only chance was to catch me unawares. She managed to unbalance me a few times. It was like living with that Cato in the pink panther sometimes. Except I got to have sex when I lost the fight. 😉