@Romper I love that finger in my ass too! My baby started doing it to me several years ago. His thumb feels the best and he says that it's easier to get in than a finger. And I only need about 2 inches to get off or make it more powerful.
When he puts his thumb in does he push down and rub your colon wall against his cock while he’s fucking you. I did that to a woman once and she had a leg shaking orgasm.
Women, like men, enjoy things that stimulate them. Not all stimulus is physical. Sometimes a little taboo sends them off the cliff. If you are giving your girl oral and she seems to be having difficulty climaxing...stuff your cock in her mouth and face **** her for a few moments and then return to giving her oral. Works every time. Similarly, flip her legs up a little higher and lick the starfish and return to eating her out. The results will astound you.