Is it normal to tickle?

I've recently discovered I really like ticking! I mean, I've always known I liked it but I always thought it was in a playful way. Until I started getting really serious with a guy. I'd repeatedly find myself pressing my knees on his forearms to make him immobile and began tickling his sides until he begged me to stop. It was invigorating! There was something about the fact that a different personality came over me; my body would get so excited and I'd want him right then and there. So, is it normal to tickle sexually?