Is it normal to see a strong female and want to arm wrestle her?

Every time I see a girl/women with defined arms and athletic shoulders I always wonder if she can give me a good match in arm wrestling, or even beat me. The only time I've challenged women to arm wrestle women is at strip clubs, where the girls who do pole dances have incredible muscles. I told one lady I would give her $200 if she could beat me and we arm wrestled for 3 minutes before she finally gave up. She was mad, but she was really strong. I gave the $200 anyway, just because she tried.