Yes, even more exposure!

'Almost...well that wasn't the smallest at least?' Matt thought to himself. Then the request...his underwear around his ankle and doing something so obscene right here in front of Alan. Without saying a word, Matt took a deep breath and gave in to the ache in his little balls. He pushed his underwear to his ankles and locked eyes with Alan and began to stroke his penis right there for him. "Is this ok?" Matt asked quietly and nervously. He was so horny he would have cum already if not for how nervous he was.

Alan smirked. “Yes very good… tell me when your close and walk over to the end of this row of shelves and tell me what you see” he said with a smirk. “And try not to be seen.”

It does not take long. Feeling Alan's eyes on him drives him to the edge and it takes all Matt's willpower to stop. "I'm close Alan." He whispers and shuffles quietly to the edge of the shelfs, trying to listen for anyone and making sure to keep his lower half out of sight. Yet he still was slowly playing with his penis, not even realizing it. As he looked around he would see about a dozen or so people reading, sat at desks with books.

“Come back over and let go of the lil guy” Alan giggled. “And then pull your undies and pants back up." Matt quickly did as he was told, buzzing with excitement. He had actually done it! Despite everything he had fulfilled a fantasy. He felt embarrassed showing off to Alan but nothing bad happened and Alan was even letting him cover up! But Matt was still achingly horny, his little erection tenting his pants even as he stood there blushing in front of Alan. He whispered "There were so many people, that was crazy"

Alan reached behind Matt and casually groped his ass a little bit though his pants. No pretense of asking, Alan acted with complete confidence he could do as he pleased. "And yet you exposed yourself... for the thrill... and loved it didn't you? Imagine if they all knew? You were a little perv with a small willy... you'd never be able to look at them the same way!"

"Id never be able to walk into this library again" Matt said quietly, but the excitement was clear in his tone. "But I did love it...I can't help it. Its like its engrained in me or something"

Alan smirked and before he could react he pulled Matt into a soft kiss.

“And now I’m going to blueballs you and make you walk up to that cute librarian with a little boner and ask for this book,” he said as he handed Matt a book about compensating. Alan eyed up the small tent Matt had in his pants. “If your sneaky she may not see the boner, it is honestly small enough to miss” he giggled.

Completely flustered, Matt took the book and walked across the library. His little tent poking out for anyone to see. He was having a completely out of body experience. That kiss had been more exciting than any kiss he had ever had and now he felt compelled to do whatever Alan wanted. No matter how shameful. He kept his eyes down as he approached the desk, unable to bear seeing if the librarian could see his shame.