How do you feel if your man looks at another women in public?

Only reply if he does. I know it's just a man thing and when me and my boyfriend are at the mall or whatever sometimes but not all the time I can catch him looking at another female. I don't let it get to me because I know he's not going to have sex with this girl, he's not trying to get at her, I mean it's annoying sometimes lol but it's not really that big of a deal I know women have different feelings on when they do it. I just don't say anything because I don't want to argue but other then that I don't really let it get to me. We have no trust issues what's so ever and I know he loves me. But I'm just asking other opinions how would you feel? Also please if you have something rude to say please do not reply I just want to ask other women's opinions.