Yep i've been there PURE. My gf does it to me on occasion. She seems to really get into it. Sometimes I have to calm her down because then she tries sticking things in there like her pinky. YOWWWEEEE.
Anyway, to answer your question, it feels wierd but good.
I'm going to put a pic of myself in my avatar when I get it....that'll be sometime tonight. I need to get around to posting a bunch of pics but all I have is a shitty quality webcam....but when I've got some cash....hmmm......