Seriously this happened:
A dog in Tennessee is going to lose his life today because of suspicions that he is gay.
As explained by Examiner.com, "According to the prior owner, the dog was seen 'hunched over,' another male dog, therefore, in this owner's mind, the dog must be gay."
One could respond to this by pointing out that dogs "hump" each other as a way of asserting dominance, thus undermining the entire basis of the erstwhile owner's decision to drop his animal off at a "high kill" animal control center. Of course, homophobes already display a pathetically poor understanding of human biology (e.g., insisting that homosexuality is a choice rather than epigenetic, despite scientific evidence to the contrary). In light of this tendency, it shouldn't come as much of a shock that their knowledge of canine biology is equally sub-par.
Update:
looks like the dog ended up being adopted, thank god. (h/t chrississippi)