Alice,

Saying the frenulum is a "piece of skin" is equivalent to saying the clitoris is a nubbin of skin anterior to the vagina. A simple review of information available since 1985 would let you know that the frenulum contains stretch receptors unparalleled anywhere else in the body. Or ask any uncircumcised man about the erotic importance of the frenulum! Please! Give accurate, up to date information!