Would you look if this was in the hot tub under your window?

There’s a hot tub under the kitchen window in the house you share with three roommates. Everyone’s going out of town for the weekend. You end up having to come home early. You enter the house and go to the kitchen for a glass of water. You look out the window and it turns out one of your roommates unexpectedly ended up coming home early as well. He’s in the hot tub on a floaty with his headphones on and his eyes closed… …and he’s completely naked. Even if he opened his eyes, he wouldn’t know you’re there because it’s dark in the house and light outside. How long do you stand there staring?