I was wrapping up an academic meeting in the back corner of the store when a customer caught my eye. He had just stepped out from behind a bookshelf, and he was sporting the most enormous and obvious hard-on in his dark pants. He looked in my direction then disappeared. Well, I was engaged in conversation with someone and couldn't immediately break away, so it wasn't until 20 minutes later that I could roam the bookstore to see if he was still around. I found him looking through books and sporting a noticeable semi. He never made eye contact and he slowly ventured towards the back of the store. I thought perhaps he was headed to the restroom where we could take things to the next level. Well, he sat down in a chair with a couple of books, so I walked up behind him and said, "Follow me to the restroom and I'll take care of that for you." He kind of looked up and I went into the bathroom. I waited a while and he never joined me. I came back out of the restroom and he was still sitting in the chair, but he was acting engrossed in the books. Not sure what his deal was, but he was obviously there for something other than books. Maybe he was interested in chicks; I dunno. His whole demeanor and behavior was odd. I've had a lot of cruising experiences, but never one like that, and never with such an obvious hard-on. It was massive and sticking way the hell out. I could make out the head of his cock and everything. There's no way he could've been wearing anything under the pants.