Imagine there's a real person who inspires all sorts of forbidden erotic thoughts that only manifest themselves in day dreams (and night dreams), masturbation, and plans for very naughty stories that may make their way on to this site.
Then one morning you see him/her for real, and he/she looks at you. And this is not the first time you've seen each other, but you thought the fantasy was only one way i.e. in your head only, and how could it be otherwise, as it's so inappropriate.
But the way he/she looked at you, could they possibly be (crash/bang/wallop) feeling something in your direction too?
Perhaps I'm totally in fantasy word. But what if I'm not?
Oh my. That's what happened to me this morning. Made my day.