For a few moments, Arlene's childhood memories of "Stranger danger" fought with the obvious fact that this would probably be one of the better courses of action; she certainly agreed that the man shouldn't be outside. Besides, hadn't her worn-out therapists always encouraged her to talk to people and try to make friends? She pulled her scarf up over her face and breathed into it, which warmed her up certainly, but also turned on incessant thoughts of [i]Get that off, you're breathing carbon dioxide.[/i] She hesitated and thought it over. Lily seemed perfectly trustworthy, didn't she? But so did some of those serial killers who'd had movies made about them. But what chance was there of a nurse being a deranged psychopath? Probably none at all. 
Finally, she replied in a mumble through the scarf, "Personally, I like dogs better than humans. You can call me Ace if you'd like."