Doctor designed penis size ‘Predicktor’ app to educate and entertain

To determine a man’s penis size, the Predicktor asks for his height, buttock size, age, shoe size, finger length and sexual orientation, then you shake the phone up and down to get the results. While height alone and shoe size are not predictors of penis size, they, along with a man’s buttock size and the ratio of a his index finger and ring finger length, are believed to be determined by a chromosomal cluster called the Hox genes. The Hox genes play a role in penis size and possibly sexual orientation.

Culligan referred to studies, including data gathered by pioneering sexologist Alfred Kinsey, that found that gay men have longer, thicker penises than their heterosexual counterparts. On average, Kinsey reported, gay men’s penises were a third of an inch longer.

“Gay pride just got a little prouder,” quipped Culligan.