A few years back, I stumbled across a website that detailed a girl’s humorous and horrific stories about working at a video rental store.
One of the stories was about a customer returning a dvd with a semen stained thumb print on it, and another about a guy having sex with the display boxes in the adult section.
Unfortunately that’s all I remember about it. 
I’m hoping through some small bit of luck that someone here will know the site I’m talking about, and be able to provide a link for it.
Perhaps you should be glad…
Na, the way the lady told the stories had me laughing quite a bit. She does the stories a lot more justice than my short description does.
I know the one you mean. I think this is (was) it:
http://www.improvresourcecenter.com/mb/tpcs1.php
tellyworth, you nailed it, thanks! Hate that it was taken down, but I’m glad to see the girl was able to make some money off of her stories.
Inner Stickler, thanks for the wayback machine link. Now I’m off to amazon to grab the ebook version.