Travis arrives at his apartment after a long day of work. The drive was snowy, and therefore far longer and more stressful than usual. All he really wants is a hot shower, a cold beer, and to watch some TV.
The 21 year old man uses his key and unlocks his door. He strolls in, and goes to the fridge for that beer he's been longing for. He grabs the Sam Adams, and with a sigh of relief, takes his first gulp. "Finally", he thinks, "Home sweet home."
As he relaxes, his senses begin to function once more and he notices that that water is running. "SHIT! Broken pipe AGAIN!"
Travis walks around the apartment, carefully listening for where the running water he hears rushing through the pipes is exiting. He starts in the living room, and notices a pair of pants on the couch. He notes this as odd, but seeing as how his girlfriend frequents his apartment, he really didn't think too much of it.
He goes to the bedroom, and see a bra and a pair of panties. Still, no water damage.
Finally, he checks the bathroom. To a normal person on a normal day, that would be the obvious place to start the search, but Travis is no normal person to begin with, and especially not all that keen to normal thinking after a long day of work and long drive home as he had today. Finally, he notices the steam and hears the shower going. And finally, his other head kicks in.