TIL that squirrels masterbate. User sagashiteiru, in the Today I Learned (TIL) subreddit, 09 Apr 2013
The adaptive function of masturbation in a promiscuous African ground squirrel -- Masturbation after sex may reduce the chance of infection. User DarwinDanger, in the Reddit Science subreddit, 03 Dec 2012
The Adaptive Function of Masturbation in a Promiscuous African Ground Squirrel User laffen, in the Sex subreddit, 07 Oct 2010