He sat across from you and “accidentally” let his dick slip. He had suspected you for a while. Since you and he were to be alone for the weekend, he figured that this was as good of time as any to test you.  He kept up the casual conversation while his cock started to engorge and thicken.  The head pushed further out of the leg hole of his boxer briefs. Every once in a while his hand would brush lightly against his cock, causing it to twitch.  You made an effort not to stare, but my eyes kept going back to his cock. Try as you might, you could not look away. 

It was obvious to him, that you were interested in his meat.  As the afternoon progressed, he became less and less subtle, playing with his cock openly. After an hour or two it was clear to both of you that you would be servicing his cock before the day was over.

You manage to look up at his face for a moment and you see the smirk.  He does not need to say it, but you know what he is thinking.  “I knew you were a fag.  Stop trying to deny it and get over here between my thighs and start sucking my cock.”

Giving in, you drop to your knees and crawl over to him.

You ask him, somewhat pathetically, “If I do this, do you promise not to tell the guys? I don’t think I could face them if they knew I sucked your cock. I am worried that they would not still want to hang out with me, it would make things too weird.” 

“Of course they will not want to hang out with you.  Once a guy has sucked a load of cum out of your balls, he can’t be your friend, and make no mistake, you are going to be swallowing their nut juice as well as mine.  They are still my friends, and what kind of selfish friend would I be if I kept a cocksucker to myself?”