During erection, the ridged band forms ridges that go all the way around, about halfway down the shaft.
Further, 82% of the women who reported the sensitive area Grafenberg spot also reported ejaculation with their orgasms.
The outer foreskin layer contains nerve endings which respond to gentle touching during the early stages of sexual arousal.
Even for those who have had an external part of their clitoris excised or injured there are still going to be internal portions of the clitoris present.
The foreskin has twelve known functions.
The clitoris is also a serious social butterfly: it interacts with over 15,000 additional nerve endings throughout the pelvis, which is yet another reason clitoral stimulus can feel so intense.