Why would a guy tell me that this other guy was checking me out?

These two workers came to work and trying to fix door I happened to work not to far away from them and one of them was staring at me the whole time and I guess he happened to see it to and tell me about it but why would he feel like he needed to tell me about that do guys just tell girls that

Why would a guy tell me that this other guy was checking me out?
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