just feels natural... apparently kissing is a relict of mouth-to-mouth feeding, and many remote cultures/tribes/peoples still do it. i did it with DS1 who's now 4 and i've just started weaning DS2 (5 months) on (chewed) bananas. also BF DS1 until he was 3 (but that's another topic altogether), and he's never had stomach bug/ear infection/flue in his life. he's also very independent and confident, so i don't see any harm. but i do appreciate it might seem odd to others, or doesn't it...?