my ex and i tried it once, and both didn't really enjoy it that much. but sometimes we would spoon naked and i'd sort of hump her ass-crack slowly... either after sex, or when she was menstruating. or sometimes we'd do the same thing but, facing each other and i'd rub against her leg or her belly, but she was a good 3" taller than me and it was all her long legs, so to rub against her belly, my chest was against her face, but she liked that when we were cuddling.
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