Artful Dodger: Are you saying love is a purely biological matter? I thought love was something beyond biology.

"because their union is incapable of reproducing. "

No, they can reproduce. As in the parts of their anatomy just don't start not working. God does not make them suddenly sterile. Just their sexuality does not give to reproduction (unless bi)....

"I can't marry my sister or my daughter or a very close relative. Such unions are restricted by law as they don't fall under the standard set by society. "

those are set for good reason of high mutation rate through a closed gene pool, not a good example if you are going on about not reproducing being part of why they cannot marry.

"What's really being sought by homosexual advocates is a special standing before the law. "

No. If you missed it (seeing as Fox only covered it quickly) ...there was a gay rights march in Washington at the same time as the tea party and the protest against Obama telling kids to work harder... 75,000+ march... though the Obama telling kids to work harder got more time and a reporter.

... basically... they just want the same rights. Equality under the law.