Ebbie, respectfully, young males are not worried about older males 'coming on' to them. That is your projection...Men don't relate to things in that manner. There is an equation that is well known in the psychological community...matter of fact it has been accurately Quoted through the years..."Lust is to a man, as fear is to a woman'.
A young male isn't regarding that...he's usually thinking about a 'pretty girl', or a cute infatuation he is having, to have the time or space to give 'fearing men', a second..or even a first thought, at all. I think just about every man in here can attest to that!
Girls, are coming from a place of insecurities, fears of acceptance, performance, and acceptability...on top of being apprehensive of possible dangers.
Note: This was answered as straight ahead, with no bias or 'value judgment' as possible