Woken up by his straight buddy fucking

In the middle of the night, a gay guy is awakened by the sound of his straight roommate fucking a girl. This gets him hard and he goes to watch and jerk off. Hearing the chick moan as she feels the big straight cock turns on the gay guy who would love to be fucked like that. He's going to cum in his underwear and then go back to bed. What he doesn't know is that his other roommate, who is also gay, is going to take his underwear and smell his cum in it...