Females Males Mean Standard deviation Mean Standard deviation Clitoris 9.17 2.12 Penis 9.00 2.50 Vagina 8.40 2.35 Mouth/lips 7.03 2.68 Mouth/lips 7.91 2.27 Scrotum 6.50 3.72 Nape of neck 7.51 2.70 Inner thigh 5.84 3.39 Breasts 7.35 2.73 Nape of neck 5.65 3.50 Nipples 7.35 3.15 Nipples 4.89 3.79 Inner thigh 6.70 2.99 Perineum 4.81 4.10 Back of neck 6.20 3.15 Pubic hairline 4.80 3.82 Ears 5.06 3.40 Back of neck 4.53 3.42 Lower back 4.73 3.38 Ears 4.30 3.50