Two tendencies: (1) Bodybuilders have tiny testes; and (2) Ice skaters — really good ones, anyway — have small breasts.
So explains Dr. Sam Shuster, Emeritus Professor of Dermatology at the University of Newcastle Upon Tyne, and Honorary Consultant to the Department of Dermatology, Norfolk and Norwich University Hospital, in a pair of articles in the January-February 2006 issue of the Annals of Improbable Research.