My guess is because it is thought the people who watch them don't want to see that, but prefer the traditional type of female figure, etc. But the muscular type is something I like too. There is a really old F/M video out there, where the woman is a bodybuilder. That, I think, is the only time I saw someone like that in a tickling video. She looked like one of those FBB girls. I'll try to take a look for it and post it here if I find it. The video itself though is nothing special, from what I remember.