The clitoris and the labia minora are both erogenous areas in the vulva. Physical sexual stimulation usually consists of touching the genitals or other erogenous zones. Parts of the vulva, especially the clitoris, are erogenous zones. The perineum is an erogenous zone for both males and females. Achieving orgasm by stimulation of the nipples or other erogenous zones is rarer. The labia are one of a woman's erogenous zones. Breasts and especially the nipples are among the various human erogenous zones. These erogenous areas can even lead to orgasm when stimulated. Along with the penis, the scrotum is sensitive and considered to be an erogenous zone. The delta is highly innervated, and is considered to be a specific erogenous zone. Cold and Taylor state in 1999 that the foreskin is primary erogenous tissue. Breasts, and especially the nipples, are erogenous zones. Breasts, especially the nipples, are an erogenous zone. The earlobe contains many nerve endings, and for some people is an erogenous zone. Breasts, and especially nipples, are highly erogenous zones, for both men and women.