Should a female ask a guy advice about another?

I notice asking a guy that either likes you or someone you used to date but don’t like any more will always tell you what you don’t want to hear.

Example one guy says a man checking me out is only being nice because I am a mother figure to him.

The other says the same maybe is doing this to everyone and it’s all in your head.

Next guy says it’s obvious a man is checking you out . Why would he stare at a mother figure.