I never quite openly admited to anyone ever, but with some girls I've been I kind of play a little bit telling them that I really enjoyed certain trait on them relate to strenght or muscle.They all always love it and were playfull about it.
With one I kind of wresled and I tell her that I loved it when she had me against tight. Other girlfriend worked as a janitor, she was really thin and taller than me. She came to my house after a day of work, I was feeling her arm and I notice it was like a little more ripped and I felt some good mass and strengh, I told her, hey this must be because of your hard work! It really looks nice, and I play with her arm, she love it.
So I think it is really better (and more entertaining) to be open about it
Thanks...