As I sit and think about clowns, it is safe to say I'm not a fan of them either. Cartoon clowns, clown toys, clown drawings - those don't bother me so much. And if I were to go to a circus and watch them from afar, that is okay, too. BUT, being in close contact or engagement with one - that is a problem for me.
No fear, really, but there is too much for me to process - the colors, shapes, sound of their voice, hidden facial features/expressions. I just can't trust them.
It's a bit of a stretch, but I do think that thought process does come in to play between Aspies and NTs...I don't accept the Aspies being the clown in the relationship, though. I think they are clowns to each other, each one confusing the other with differences in expression. Perhaps the initial uncertainty and distrust will pass, or each will walk away saying "can't sleep, NT/Aspie will eat me".