history: Changing sex at the same relative body size
Life
David J. Allsop1 & Stuart A. West1
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Sex 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 the simple rule that individuals change sex when they reach 72% of their maximum size. This suggests that there is a fundamental similarity across all animals, from a 2-mm-long crustacean to a 1.5-m-long fish (Fig. 1), in the underlying forces that select for sex change.
How to Become a Sex Therapist
Would you like to become a sex therapist? For those who feel they have the sensitivity and ability to help people cope with sexual problems, this is a wonderful field. Here are the steps you need to take to get you started.
Instructions
1 Seek advice from those prevalent in the field about how to become a certified sex therapist. A great starting place is the American Association of Sex Educators and Therapists (AASECT). (See resources below for contact information.)
2 Gain admission to a reputable university that offers degrees and/or specializations in human sexuality or sex therapy. To practice as a licensed therapist, you must at least attain a Master's degree in the field (see Resources below).
3 Work with an established clinician as an intern. After you graduate, you will want to learn to become a sex therapist by working with someone who can supervise your work and offer insights on ways to improve your technique.
4 Get licensed for your state. There is no license for "sex" therapy but to practice therapy, you should be a licensed therapist. Once you have your license, you can specialize in sex therapy.
5Become certified and you're on your way to a lifelong career as a sex therapist.
