If you insult the person someone loves, you kinda lose the right to complain they're being an asshole to you subsequently. Poo's attack-dog mode was the "right" answer--most of us value friends and signifigant others who are loyal behind our backs. While it may not be wildly logical to choose overboard/illogical behavior over passivity, it's nice. If he didn't get offended, he'd be a cunt. He's not and you'd do it with your chickie too Ali, move on?
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"She has no waist, no arse...an interesting face...but all we are really worshipping is two bags of silicone"
Martin Amis "honoring" katie price with a character bearing some of her traits