They don't make it easy on you.

You watch as the girls get themselves into position. Michele kneels in front of you and starts dragging her brush across your pubic area. Chloe starts applying a white paint on your chest, her head close enough to yours to block your view of Michele and your lower half. Behind you Ashe start moving her brush on your back, and Gabby begin work on your legs.
They work diligently for a few minutes in silence, until...

"H-Hey!" You say thrusting forward as you felt a cold hand squeeze on your butt cheek. "What are you doing back there?"
"Geeze John, calm down." You hear Gabby say as she clamps down on your butt again.
"Calm down? Your squeezing my ass! How did you expect me to react?"
"Yeah no shit I'm squeezing your ass, I'm trying to paint it while you keep wiggling around!"

"Yeah John, you are moving around a bit too much." Michele spoke up from below you. "And if you could do me a favor and not suddenly thrust your hips like that again, it would be much appreciated. I'd really prefer not to have a third interaction between your cock and my face today..."
"Third interaction between..." Chloe repeats confused. "Ok you really need to tell me what happened while I was gone."

The girls around you giggle as Ashe gives you a strong pat on the back.
"How about you explain yourself to Chloe, Doe?"

"Wait, what?"

"Yeah, go on and let Chloe in on the joke. We've been keeping her in the dark for too long."

"Well, uh... Well you see..." You stutter out as the girls around you fall silent, waiting for your telling of the humiliating event. "When I was moving around, I kind of accidently."

"Accidently?" Michele speaks up in a semi-mocking voice. Gabe and Ashe laugh aloud as your blush intensifies.

"Yeah, accidently." You clarify over the laughter and giggles. "I accidently pressed my dick into Michele's face when I was moving around on stage."

"Twice." Michele adds, getting another round of laughter.

"Twice." You repeat, trying to not let your embarrassment show in your voice.

"So let me get this straight, John cock smacked you twice?" Chloe asked in slight disbelief.

"Yup." Michele said recounting the event, you can tell she's still a bit upset from the dry tone of her voice. "And as you could tell I'm a bit skeptical with his whole 'accidently' claim, considering his dick is still has been stiff ever since he exposed himself to us..."

"Wait Michele, are you suggesting John is getting off to being ogled nude by a bunch of girls?" Chloe asked with a cocked brow.

"Well, I think the current state of his member here answers that question for him..." Michele said giving your penis a playful smack with her palm, sending it bouncing and bobbing around.

"H-Hey!" You shout, thrusting back to get your dick away from Michele.
"Nice ass, Doe. Could you maybe not shove it in my face though?" You hear Gabby mumble from behind.
"Oh, shit. Sorry!" You say before quickly thrusting forward again.
"Oh, make that four attempts now for 'accidental' face to dick contact." Michele chimes in.

The girls laugh as you stand still, mortified. They're really not making this at all easy for you, treating you more like a toy than their friend. You somewhat expected this from Chloe, after all she does have a vendetta against your, but from Michele, Ashe, hell even Gabby. She was somewhat of a bully towards you but you never expected her to take advantage of you in a way like this before.

The group seems to fall silent after that. You do your best to avoid thrusting suddenly, or moving, or speaking. Really you avoid doing anything that would invite more comments from the girls. You hopped that the lack of an additional attention would let you finally soften up down there, but through it all you where still rock hard. You've never been able to keep a boner this long, and the worst part is your best friend has been observing you record arousal from her position inches away from your crotch. Even if you do somehow stay friends after this, she'll never let you live it down.

You try and distract yourself by looking into the side mirrors to see how progress is going, and what exactly they're painting on you.