Thing is how she feels about it, if he hurt her emotionally it's almost the same as hurting her physically.
Who cares how she feels? Boo hoo, let her fvcking cry, I would've gauged her reaction and told her to suck it up, there are a lot of things to get pissed off at in life, a compliment is not one of them. You could have said:
"Mine are better, don't you agree? (looking at the girl)"
"They are so-so, I guess, I've seen bigger"
Poked one and said "yeah they're real too".
All of these would communicate higher value.
What is all this nonsense about women getting offended, tell her to fvk off and get a life. I'd tell you the same thing you beta ass white knight, the fact that you are even mad at this, says you have exactly 0 game and no other options. Defending a 'woman's honor', give me a fvking break. If you had reacted violently, more than likely, you'd be in the clink and he'd been fvking your broad right now. If you white knight, he becomes the 'cool ass bad boy'.
It would have been different if you were out with a disabled/retarded/autistic woman and someone had said "What an ugly fvking retard!" or "Hey corky you got a gf!?!?!" or "You stupid or something?"... then you are defending a person who cannot stick up for themselves, different. If a woman is insulted in America she just dials 911 and says the magic words
"I felt scared", "he made a sexual comment and I felt violated", "blah ,blah,blah,rape". She doesn't need you dude.
She doesn't need you.