I've been known, from time to time, to put on two pairs of panties, roll up a soft towel and dry hump it.
That's for when I'm not gonna be able to have sex for awhile and I don't want to just rub one out real quick. The extra fabric covering my vulva takes away sensitivity and it takes me longer to cum.
It's a work out. It's kinda high maintenance, cuz I gotta wash the undies and towel when I'm done. So, I don't do that very often.