why are you licking me?

My (newly) 3 year old likes to lick anyone and anything she can. I think it's pretty humerous, especially when she gives an unsuspecting someone a kiss that turns into a "lovers kiss" if you know what I mean. The grandmas have been surprised more than once. I think it's kind of weird but whatever...She's sitting beside me as I type and licking her own feet. I think she just likes to experiment with different tastes and textures. My boy never did that. I guess I won't worry about it for another 13 years when our door is beaten down by pimply teenage boys looking for "the tongue" otherwise known as my daughter.