How to Become a Sex Therapist

history: Changing sex at the same relative body sizeLife David J. Allsop1 & Stuart A. West1Top of pageSex change occurs in a variety of animals, including fish, echinoderms, crustaceans, molluscs and polychaete worms1. Here we show that the relative timing of sex change is surprisingly invariant across all animals: 91–97% of the variation in size at sex change across species can be explained by