It's hard to write or describe in english for me.I think i like it because i do a lot of sport in my life and and i would love to meat a women that love sports to. And muscles are a result of sport.And it's rare to find a girl with muscles, this is for me a appeal to.I don't know exactly, my jung me was fascinated from women with muscles and my adult me love it 😅I hope you could it a little bit understand