From Steve Ray:
“Recently I had a heated discussion about homosexuality with some good liberal friends. They contend that since homosexuality is seen among animals and since “God made people homosexual” that it is natural, normal and must be accepted. The discussion was heated though friendly. I thought I would respond and I share the response with you.”
http://www.catholic-convert.com/blog/2014/09/06/homosexuality-in-animals-and-in-human-genes/
God gave man ‘dominion over’ the animals. This would not mean he should behave like them. He needs to have control over his own animal instincts, and behave like a child of God.