Dave walks in on Dirk and John getting a little hot. He makes poor John embarrassed.

You're on his bed, pink in the face and shirtless. His lips are all but attacking yours, and he kisses you with bruising force. Your mind is hazy from the afternoon sun and Dirk, and you grasp at him, trying to anchor yourself. He doesn't give you time as he moves down from your lips skillfully, kissing and sucking and biting his way down your jaw, your sensitive neck, your chest. He plays with your nipples, making your arch into him and keen. You're glad Dave isn't home - you're too loud for your own good.
You tug on his shirt, wanting it off, wanting to see him. He obliges, and it's off in a blur. You move up, going to the junction between his neck and shoulder, kissing there for a moment before sucking, and he pets your hair before pushing you back down.
You like where this is going.
You tug off his hat and shades, a clear sign of what you want. He smirks down at you lazily, grinding his hips into yours, and you moan.
He tugs on your shorts, unbuttoning them quickly, his mouth latching onto yours again to muffle you. You've gotten complaints from the neighbours, and Dirk swears the next place you move into will have a soundproof room. Until then, he's stuck not being able to hear you hardly.
When your shorts are undone and you've wiggled them down to your knees you kick them off, revealing ghostbusters boxers. He chuckles a bit at your fashion choice, but doesn't comment, sliding down until his mouth is level with your crotch.
"Bro, do we have any -"
You and Bro look to Dave standing in the doorway, staring at you.
"Join or leave, Dave," Dirk says, and you kick him.
"Yeah, whatever, not like John hasn't walked in and joined me and Kit Kat."
"Oh my God Dave leave! That was one time and me and Dirk weren't even dating!"
He shrugs and walks away. Dirk raises an eyebrow at you.
"You're definitely telling me after."
You groan. "I hate you all."