I thought this was a little strange.
It's the first time I have seen a minimum size requirement from a provider.
Copied from the first page of her website;
"I'm glad you found me. I'm a private assistant to a very specific kind of man. My skills are best suited for the well-endowed (seven plus). I know this makes me very unusual but please forgive the screening. I truly enjoy what I do and I hope to be able to share that. I feel its better for me to be honest and up front about what will make the best experience for us both and there are no exceptions".
http://www.theprivateassistant.com/home