Just saying you then haven't met someone who can prove you that heart is a logical thing, that means if it gets a logic, it has to work both ways(the logic), heart then will switch to green light and lets everythign pass through, even not so good stuff.

Other thing is if to you someone is embarassing or little compare to you then you auto-reject it, but you can notice it and then let it in by using will or acceptance, that is the thing you can do without logic.