Questions about sins of the flesh . . .

As of late I have been getting quite a few inquiries involving various sins of the flesh. I usually field such questions with the template that the two-fold purpose of the sexual act is to

1)Be procreative (Not that every act must result in life but must at least be OPEN to life and
2) Be unitive wherein the man and wife become one, renewing their covenantal bond

The end must be these things not pleasure in and of itself.

This shows the intrinsic wrong in homosexual acts, in contraception, and a slew of other sexual immoralities as they are not 'open to life' nor are they unitive within the context of matrimony. They also have pleasure as its direct end.