Relationship.

Relationship between humans are supposed to be heterosexual.
God made Eve to accompany Adam.

Everyone is looking for Love.
But some look for Love in the wrong places.
I think Homosexuals crave Love more than anything esle.

And perhaps the reason why homosexuals keep changing partners is because they don't feel "right" with that person [who is of the same gender]? Well, they are not intended to be like that.