The real reason creatures lurk in children's bedrooms and scare them...
Because the existence of children remind them of their own inability to procreate.
The natural process of perpetuating life is denied them.
Because they are not natural.*
So they hide under the bed, because they can't do what's necessary on top of it.
They inspire fear in others to avoid facing the fear of their own inadequacies.
Boo! they say. Seemingly to scare the children.
But it's actually projection aimed inward.
They monsters are booing themselves.
* Unnatural or supernatural. Not artificial.
100% organic original recipe monsters.