Kisses

Do any of you kiss your baby, toddlers, kids etc. on the lips? Why or why not? I do I have my 6yr old son and my 10yr old daughter we give quick pep kisses when we say bye to each other. Not all the time but mostly we do. I don’t do it thinking anything bad but some family members have brought it to my attention. I get the whole unsanitary thing but it’s not like (parton my language ) I go and kiss them after having sex or doing anything gross.. idk it was just a thought..