Decline.

"Eww," you say. "That's gross."

"No, it's not. It actually tastes pretty good."

"You're a girl. It's different for girls."

"I don't see why. We've got the same tastebuds, don't we?"

"But tasting come doesn't make a girl gay."

"It doesn't make a guy gay either, but whatever." She gets off the bed and strides over to the door in confident strides. "See you soon," she says and walks out, closing the door behind her.

You put your clothes back on and lie down on your new bed. You must have dozed off for a bit because the next thing you know there's a knock on your door and you're startled out of sleep.