But he doesn't say it because he IS pregnant, hes saying it because hes taking ownership. This IS the topic.
Hes allowed to say what he wants about his child, they're pregnant. Sure he may not be ACTUALLY pregnant, but hes connected on a level that he feels he can say that he is experiencing "pregnancy" not the actual term but the entire process, taking care of the women while she needs him the most, if someone feels entitled to say "we're pregnant" let them. I don't even understand how it can be brought up as an argument. It seems so insignificant, and even more so that it doesn't even directly involve you.