Not intentionally. If DD goes to kiss me and kisses me on the lips, that's perfectly fine, but it's not something I would initiate. It feels too intimate to me, but I certainly wouldn't raise an eyebrow if I saw someone else do it w/ their young children.
I would NOT like it if anyone else kissed my DD on the lips (even her beloved grandmothers. Too intimate for my comfort, and not something we do in our family)
I find it very interesting that there are adults who still kiss their parents on the lips. That must be a cultural thing, because it's not something that would even occur to me. Ick. Once I kissed my first boyfriend (Dh!

) at seventeen, lip kissing=romantic kissing for me.