Justin lay down between Brian's legs. He tried to recall exactly what it felt like when Brian did this to him. Immediately he began to get hard. He wanted Brian to feel like that.
Unsurely he placed his hands on his ass, tentatively kissing the top of his crack, before darting out his tongue.
It tasted like Brian. Like his neck, his chest, and his skin. Justin wasn't sure what he was expecting it to taste, but the familiar taste was reassuring. With a deep breath his usual confidence returned and he boldly stroked his tongue down between his cheeks.
...
When his tongue reached it's destination, he gently pulled apart his cheeks with his thumbs and circled his tongue slowly around the wrinkled folds of skin a few times. When he felt, as much as heard Brian sigh, he grew bolder and brushed his tongue directly over his hole. Brian's body seemed to tense slightly. Justin looked up.
"Brian?"
"Justin, you're fine. Trust me."
Justin ran his tongue over his hole again and this time continued lower, licking just behind his balls before bringing his tongue back up and circling his hole. Brian rocked, ever so slightly, back against him.
...
Justin grinned to himself, and slowly pressed the tip of his tongue against the opening. He felt the muscle tighten against his tongue. He circled it and then pressed against it once again, until his tongue breached the tight ring of muscle. He moaned, and the vibrations of his tongue caused Brian to groan in response.
Justin's dick was impossibly hard, he couldn't help but rub against the sheets. He slowly pushed his tongue deeper. Licking him from the inside.
He tasted so fucking good. Justin rutted in time with the thrusts of his tongue, coming before he knew it.
...
Justin hadn't stopped coming before Brian flipped him over on his back, legs over his shoulders, condom on and two lubed fingers making quick work of opening Justin up.
It seemed like only seconds before he was buried inside of Justin to the hilt.
He fucked him fast and hard, his mouth equally demanding as Brian's tongue searched for his taste on Justin's tongue and lips.
Brian thrust inside of him, coming in few short strokes.
Justin thought he'd done he must have done an alright job in his first attempt at rimming.