Design.
To go against the flow of life. To become dark.
To not allow God to bless you, with such as your own children, an eternal life made by you. One of the greatest blessings, above what the angels behold.
All sin is, -is not letting God bless you.
He knows best, we think we do.
We think we can see the greater blessing.
Wicked-ness is the blessing of self.
I believe homosexuals are involved in this selfish blessing, as we all are. Only there lust for self, becomes sexual. Some have it in money, power, knowledge, and so on, they find it in them selves in a sexual lust.
Hence: Man and Man, or Woman and Woman.