**Yes, but his arguments above only address contraception as a deliberate attempt to avoid conception. **
Either the marital act is to procreate or (when contraceptiing) it is not. No gray area here.
Depends what he means by “the marital act.” Does all erotic activity constitute “the marital act”? There are many different kinds of “sexual” acts that are non-procreative without artificial contraception. He doesn’t address why these are forbidden.