Circumcised males cause vaginal cancer in females, but that is a no-no topic within the medical community.
The circumcised penis has full rubbing contact against the vagina, causing small amounts of damage spread over years and years. Some of these women develop cancer.
Much of the deep vagina thrusting movement of an uncircumcised penis is within the penis itself as it glides in and out of the foreskin. Thus there is far less irritation to the vaginal wall.
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