Skinny, YES!
I am skinny w/ small breasts, but also very muscular. Elongated muscles, thankfully.
My boss (who I have a thing with) is huge w/ huge hands, and he tickles my ribs and grabs my hipbones (which I'm glad protrude) and just digs in. He was doing this to me one day at a park (fully clothed, standing up) and I got off right away w/out any grinding or anything. I guess I like my bones in my torso area being grabbed and tickled. When I've gained a little weight I do not enjoy being tickled.
I LOVE being skinny, but I also love the muscles.