I want to try humping my pillow, but I'm worried I'll wreck it. Will it smell? Will I be able to sleep on it again?

Is sexual pleasure painful? Cause I watched some women mastrubate on the net, and they always have this really horrible look on their face as they get into it, like someone's stabbing them or something.
Why do they do this? Is this just a porn thing?

How do women mastrubate with their breasts, instead of their vulva? I'd like to have a go, but I'm not sure how.

I'm a 15 year old girl and I want to mastrubate, but I tried it and the dampness around my vulva really bothered me, and when I sniffed my hand it really stunk. I don't have any problems or insecurities with my body, just the wetness and smell was kinda gross (mostly the smell, though). Any suggesti...