As he's walking, he makes a choice. "I don't feel comfortable being *that* close to my siblings... So I'll go for a stranger. That's a great idea!" And so, he walks through the house. He had his clothes, at least for now, so unless he's seen doing the act there's no real issue.
He took a moment to take in the house. If he succeeds, it'll probably be a bit before he returns. But, even still, he kept making his way to the door. With a moment of hesitation, he turns the doorknob, and walks out, closing the door behind him.
It was nice out, to where he didn't think it'd be an issue if he *did* have to wait a while. Warm, but not too warm, and bright out. He walked down, looking for good places to hide if he went for that route, or just generally looking for a target he was interested in.