Even an unbelieving father, who has the light of nature soundly lit in his life, would take pride in a son that exhibits masculinity and would consider himself a world-shattering failure if this did not become so. Imagine someone claiming to be a believer in Christ, and a supposed "minister" at that, officiating in his son's same-sex "marriage"!
Imagine no more! Emergent, soul-damning heretic, Brian McLaren, did just that.
A couple of pertinent links on homosexuality: The Pagan Roots of Homosexuality and Effeminacy in Leadership: More the Effect Than the Cause of God's Judgment