I find the debate about homosexuality in animals a bit misleading. Animals do not have the sexual hangups humans do. Bonobo’s (a type of chimpanzee) are highly sexual and use the activity for a variety of things such as reconciliation.
Domestic canines will hump objects in ritual domination as do other animals…including females. So, the premise may get some good coverage but to label activities as conclusively homosexual is a diservice to the animal behavior field.