The Real Presence: The Eucharist: Foundation of the Christian Family [Catholic/Orthodox Caucus]
They can (and do).
I have a number of friends that keep saying that the church as a whole is fighting the wrong battle. What they mean is that there are reasons we ended up with the homosexual movement taking out cultural institutions. Sex in whatever situation had become something that is viewed as strictly recreational, and with no strings attached (including self sex for lack of a better term).
Once you stop view the act of procreation for what it is, you have a very hard time drawing the line at one form of sexual gratification or another.