Now, this is how they need to advertise these items. The commercial would be much more exciting if they showed ppl being tickled rather than having their teeth cleaned.
A very important step is trust. She needs to establish trust in you and feel comfortable about you. Then she'll be more willing to try new things with you. So don't worry about tickling her now. Just spend time with her and gradually work up to that.
If you have Windows XP or 2000, you can set permissions on the folder where you keep this stuff so that only a particular username has access to the folder. You can even create a new Windows account to use just for surfing and downloading the "interesting" files.
My belly is not pierced but my husband persuaded me to start wearing belly chains. It really drives him crazy especially if I wear it tight. He will always play with it and it always leads to tickling.