The penis is really an organ (no, not a muscle mass) that’s designed mostly of spongey tissue. This spongey tissue fills with blood to result in an erection, in order to have penetrative solo or partnered sex. "Plan Assertion On Circumcision". Royal Australasian College of Doctors. September 2004. Archived https://lukashrbmu.suomiblog.com/the-best-side-of-threesome-46723568