I really like abs on girls, but not so much if they are just so thin that you can see them. My girlfriend is thin but her abs are also very trained. Its just amazing to feel how hard they get. You can feel every single one of them.
Also when she lifted me, I could see how they get bigger and you can see really good how hard she tries. Thats one of the arousing parts for me.
Also you can touch abs very good while having fun.
