however in purely biological terms, there is actually nothing at all that the male needs to do after having sex. This is obviously far from true for the female.

If you are purely talking about gestation and birth then yes of course, this isn’t something a man can do currently. If you mean anything else I’d like to hear about it — specifics please.

But you only need to look at typical differences in male and female reactions to the babies of other people to get a feel for the idea that there might be something in this.

I’m very wary of generalisations like this, particularly when you provide no evidence other than what you believe you have observed. I asked for evidence previously and yet all I hear is common sense, personal observation and hand waving. Personally, I see the complete range of responses from both genders.

What exactly is it you are referring to in saying your experience contradicts what I express?

I am referring to the the fact that I share the parenting equally with my partner, and know many other couples who do the same.