Using baby oil or massage oil is HOT and increases sensitivity. Using restraints is also super fun! It'll drive you mad as a lee, and she'll love it as a ler. There's just something about not being able to escape the torture 😉 if your feet are ticklish, have her try lathering them up in oil and going crazy on them with a hairbrush. Mix up the speed, intensity, and method of tickling. It'll keep you on your toes and make it so you don't know what's coming next. Speaking of which, blindfolds are pretty amazing too if you're into that sorta thing. Wearing lingerie could spice things up pretty nicely as well. Some people are into using tickling as foreplay too.