I thought a thread featuring articles and studies might be a good idea. If the link doesn't explain the nature of the study please put in a description.

Hormonal Independence of Courtship Behavior in Male Garter Snakes(T. s. parietalis)
http://people.oregonstate.edu/~mason...dependence.pdf

Sex and seasonal Differences in the Skin Lipids of Garter Snakes
http://people.oregonstate.edu/~masonr/pdfs/008sexandseasonal.pdf