False argument. You are saying that if the sex act is open to conception, it is not a pleasure. Or something like that. Obviously pleasure is inherent in the act, just as eating is inherently pleasurable, but also for nutrition. People who eat junk food, or too much, are ignoring (or overdoing!) the nutrition part. It is entirely possible to eat for health and pleasure; doesn't have to be on OR the other. Same thing with the marital act. It's not "either/or".
I agree. Within the marriage relationship, it can be either/or or both. But outside that, it is not to be done.
We agree more than we disagree here.