Fiancé looking at other women

So I know for a fact my man would not cheat on me and would flee any scene if he finds it to be compromising for him. He treats me like a Queen, and I can honestly say we are in love. However, I have noticed sometimes he checks out other women, for example one day we where at pool at a woman in a small bikini soaking wet walks past and he stares at her for a few seconds too long, I mean I can hardly blame him right? It bothers me but I don’t really consider this a red flag or a “problem”. For me personally, I don’t really feel visually attracted that way to men, I’m more of a person who gets turned on by feeling safe and secure and all that. Is it weird that this doesn’t bother me (I mean it does but not to a point of action)?