A guy goes to a girl's house for the first time, and she shows him into the living room. She excuses herself to go to the kitchen to get them some snacks and drinks.
As he's standing there alone, he lights a cigarette. After a while he notices a cute little vase on the mantle. He picks it up, and as he's looking at it, she walks back in.
He says, "What's this?"
She says, "Oh, my father's ashes are in there."
He turns beet red in horror and goes, "Oh God no.... Oh!!! I just....."
She says, "Yeah, he's too lazy to go to the kitchen to get an ashtray."