Do guys ask each other about their girlfriend's boob size?

I overheard my boyfriend talking to his friend the other day and his friend asked him about my boob size. I just wanted to know if it's normal for guys to ask/compare their girlfriend's sizes or if it's a bit weird? It doesn't bother me so much if my boyfriend talks about me but getting asked about by someone else is different. I'm not really sure if I should confront the friend since I don't really know them that well.
Do guys ask each other about their girlfriend's boob size?
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