Missionary position. I (m) have tried doing it the way I masturbate her during foreplay: With index and middle finger in circles, hand pointing towards her crotch. That angle is just uncomfortable. Someone suggested using my thumb. I just don’t get how? This might sound really stupid, but I feel like I always slip out as soon as there is enough space to put my hand between us to not hurt anyone with my hand bones. Thanks for your help!