Why men can't think straight in pretty women's presence

I’m not so fussed about a guy observing (read: ogling) another girl in my presence - there’s been a time or two when I’ve taken a moment to appreciate Khuda ki kudrati khubsurati in a man passing by… I figure all I’m doing is appreciating the natural beauty that God has so graciously blessed us with :halo:- then a man can enjoy the beauty that nature has to offer - though I draw the line at observing :wink: