>Indian scientists reported that the sub-preputial moisture contains lytic material.
副包皮の湿り気は溶解性の物質を含んでいる。
>Lytic material has an anti-bacterial and anti-viral action.The natural oils in the lubricate, >moisturize,and protect the mucosal covering of the glans penis.
>As with other neurologic structures such as the brain, the tip of the prepuce is richly supplied with blood >by important vascular structures. >The glans penis receives blood through the frenular artery. >The prepuce serves as a conduit for several important veins. >Circumcision may contribute to erectile dysfunction by destroying these conduits.
Effects on sexual and marital relations associated with a missing prepuceより
Depending on the individual, the permanently exposed glans may experience an excess of stimulation, or the wrong kind of stimulation, during intercourse which can lead to premature ejaculation (lack of "staying power") in the circumcised male. The tight foreshortened immobilized skin of the circumcised penis is more vulnerable to laceration, bleeding and pain during intercourse.
http://www.cirp.org/library/anatomy/ O'Hara and O'Hara surveyed 138 women who had experience with both circumcised male partners and intact complete male partners. 20 of the 138 preferred circumcised male partners while 118 (85.5%) preferred intact male partners with anatomically complete penises over circumcised males. The respondents reported that circumcised partners tended to ejaculate prematurely more frequently than intact male partners. Some respondents commented that unaltered male partners appeared to enjoy coitus more than their circumcised counterparts.
In summary(まとめ) the prepuce is a unique specialized structure with important immunological, protective, mechanical, erogenous, and sexual functions.The prepuce is essential to normal copulation.