Hi I'm so sorry to have kept you waiting so long.
pixiv is Japanese famous illustration SNS (generally survice that you see illustration is free but some survice is not free).
http://en.wikipedia.org/wiki/Pixiv
pixiv is not virus site but There is contains adult illustration.
This is my account...
Thanks for your message.
This is my page that Japanese illustration SNS
http://www.pixiv.com/users/4570647
If you see favorites, you can see F/M tickling pics