I had this problem, hand kept slipping down onto the head and it hurt, how your fix it? Use magnesium carbonate chalk(weightlifting/gymnastics chalk). This will keep your hand from slipping, I only need to apply if to the skin b/w my thumb and index finger once. Once I’m done I wash my dick and hands and then apply moisturizing lotion to both(the chalk tends to dry the skin)
Yeah, it’s not my hand that really moves, it’s the skin under my hand that moves so consequently, my hand is just following my skin.