which means i violently masturbated so that much that its hard for me to cum while having sex because my penis isnt used to the fine soft tissues of the vagina. Only when im being super violent and agressive with my hand im able to cum, not when having sex. So what i did was i try to train my dick to be able to have sex with a vagina, so i got a paper towel roll, took out all the toliet paper from it, then wrapped a small layer of toliet paper on the roll. I then put the roll in water briefly, then i put some lotion on my dick and started to try to have sex with the toliet paper roll. I couldnt do it, i tried for maybe about an hour naked on the bathroom floor trying to mastrubate with a toliet paper roll, to no effect, it got to the point where the lotion and water where one and i was sweating trying to do it. almost like a workout. half of the problem was purposely being gentle while trying to have sex with the roll cause the point of it was to simulate having sex with a woman and be able to train my dick to cum when i have sex with a woman. finally after an hour of thrusing my dick into the toliet paper roll, i barely manged to cum a bit. then the next day later i was able to cum with the roll very quickly. Now im able to cum without having to be violent or fast while masstrubating, i can do it at a normal speed and still be fine