Apparently we are supposed to my friend's babies a gift every time we see them?

I have a good buddy, and he's unfortunately been married to a woman that me, and most of his other friends are not too fond of. She's successfully alienated most of his friends and replaced them with her friends.

Because of that, my GF and I try to see him, and purposely avoid going to visit them, but they just had two kids in rapid succession (within 13 months), so we've visited a couple of times and brought gifts for the new arrivals.

Anyway, I was able to peel him away from the wife for a night of drinks and he invited us over to his house again for a 4th of July BBQ. I said we'd be out of town, but thanks for the offer. He mentioned that it was too bad because his wife likes having us over because "you know that you have to bring the babies a gift every time you visit".

What the actual fuck?? Is that real? There's so many factors at play here. They're both in the medical field and make a ton of money. Why do they care if people bring gifts every time. Also, his wife is from Asia originally, but I have other friends who are Asian, and it doesn't appear to be cultural. Why would anyone think you need to bring their crotch loaves a gift every time you see them?

Needless to say, we wont be visiting any time soon.