Ernie introduces himself

Ernie decided that he must meet his voluptuous teen neighbour.

So next Saturday, he waited for her parents to go out for the day and he made his way over to their house. He had been watching the house all morning, so he knew there would be no one else home.

As he approached the door he could hear girly screams and giggles coming from the other side of the door.

Ernie stopped for a minute to consider, knock on the door and introduce himself, or move around to a window and try to see whats going on?