Gary felt his own cock growing harder from the excitement of watching Dave. It was now or never.
"Dave," Gary said, his voice trembling slightly, "You want to have sex with me. You want to be inside of me. Your cock is so hard now, and your desire is so strong, you can't resist. Rub the lube up and down your cock."
Gary watched Dave eagerly unscrew the cap and squirt some into his hand. As he touched his palm against his hard on and began to rub he moaned. "Oh God," Dave said, "It's been so long since I felt anything even close to this."
Gary turned and put the palms of his hand on the mattress, bending down. "Dave, you will slide your well lubed cock into me very slowly. This is my first time and you will be very gentle. As you begin to enter me you will realize that you would do anything for me, anything I ask. As a reward for this correct thinking you will be able to have an erection anytime you desire. You will no longer feel the frustration you felt before."
Gary felt the head of Dave's cock touch the crack of his ass and his body tensed. "No," He thought to himself. He couldn't tense or it would be uncomfortable, or so he had read. He willed his body to relax.
Gary felt the tip of Dave's cock press against him and work slowly into the small opening. Gary gasped and wrapped his fingers into the soiled mattress sheet. It was so tight! He tightened involuntarily then gasped again and tried to relax.
Dave patted Gary's shoulder. "Its fine, son. It feels so good." He slowly worked in a little deeper. Slowly in, slowly out, the lube running down Dave's cock as he moaned.
Gary felt his own body responding. He felt his hard on, like steel now, the head rubbing against the mattress as he swayed his hips. God, he had never thought it would feel anything like this. He moaned and matched Dave's rhythm as best he could.
Dave pushed in a little harder and placed his hands on Gary's shoulders. He was breathing heavy as he felt Gary pushing back against him, begging for more. He obliged and let the last of his raging hard on penetrate Gary's anus.
Gary's head tossed back as he moaned "God that feels so good. Dave, I want you to cum inside me."
Dave grunted and thrust deeper into Gary. He moved more quickly, feeling his need grow. Gary felt Dave's cock throb deep inside him and knew it was time. He felt the hot fluid explode inside and felt his own cock begin to spew into the mattress. He had never felt anything like it. It was like on orgasm that shot through his whole body.
When it was all over and both men had dressed Dave thanked Gary for solving his problem and found he had a new found desire for younger men. Gary had to admit that he had enjoyed it more than he expected.
Gary knew, now, that he was not gay. Nothing against people of that sexual orientation but it wasn't for Gary. No, Gary knew he was bisexual. He loved the feel of a woman's soft flesh, the wetness of their sex. But he also loved the rough feel of men. The physical hardness of a cock.
They opened the door and headed downstairs, Dave's arm around Gary's shoulder, both of them laughing and scratching like a couple of men. As they stepped down the stairs they passed Amber and Kelly heading to Amber's room. Gary smiled and couldn't wait for the next phase of his adventure.