Talking to another girl for his friend ?

My partner and I went out last night with a group of our friends for his 30th birthday and during the night he asked me “If it was okay for him to approach a random girl in the restaurant for his friend” I told him no wtf that’s so weird your friend is old enough to do so himself and he got upset over the fext I was bothered and told me I was acting “retarded” he continued by stating “out of all the women I have been with no one ever had seen an issue with it” mind you we are all in our late 20s I don’t see why it’s his issue to talk to a girl for his friend. I don’t get jealous but I saw it as so stupid and such a sickening excuse to say that ! And to compare me is just beyond words. So me getting upset ruined his birthday ! Am I wrong ! ?