Gay sex will always have more health risks than straight sex (speaking in general terms, since there is obviously overlap in some of the practices and habits); gay couples will never have as many children as straight couples (which has many other social implications); and two men or two women cannot possibly experience the fullness found in a healthy male-female relationship. It’s simply the way God made us, and it makes perfect sense.

Source: Why gay ‘marriage’ has not cured gay loneliness