PMID: 3360302
Genet Epidemiol. 1988;5(1):43-59.
The effect of nutritional factors on sex hormone levels in male twins.
Bishop DT, Meikle AW, Slattery ML, Stringham JD, Ford MH, West DW.
Department of Medical Informatics, University of Utah, Salt Lake City.
Androstanediol glucuronide, a steroid that reflects tissue formation of dihydrotestosterone, was inversely correlated with caloric intake, theobromine and caffeine.
So, if we avoid dark chocolate (5x the theobromine of regular chocolate), all caffine, and starve ourselves, this might help. Not the first thing I’ve read suggesting men interested in having a good sex drive avoid both theobromine and caffine. This could also explain why some guys get very hungry post-fin.