In 2001, swiss zoologist Clause Wedekind conducted a study.This link is the best description with legit sources I could find without paraphrasing my own...laziness is a disease,

http://ndt.oupjournals.org/cgi/content/full/15/9/1269

Anyways, your eyes probably hurt after that.... What if couple of the male participants was on 500mg/wk of test. I understand steroids don't affect genotype. So that means test wouldn't affect MHC?

or is this speculation