I know I'm in the minority here, but I've always found it more demeaning to them than it is to me. $0.02

I don't believe on looking down upon the person, but gay/straight/whatever, if that 5 seconds is what you need for your jollies, that is pretty fawking sad and I do look down upon that, not with contempt but with pity. That's a truly pathetic state for a person to arrive at in life.