Why is my baby "dipping" his pacifier?

My baby does this little move before he sticks his pacifier (and sometimes teething biscuit) into his mouth pretty frequently. It seriously looks like a person dipping a piece of handheld food into dip or condiments. It makes me laugh because it seems like such a grown up thing to do for 7 month old who's still fairly new to solid food. What is that? Does your baby do this? Is it learned from watching the parents, or is it instinctual?