I don't think you failed your baby at all. I have a terrible habit of kissing baby's on their heads...babies I don't know well at all. If I'm cuddling them I automatically kiss the top of their head. I must have done it to my babies a lot.
I have noticed that my friends who are child care worker's engage with babies a lot more freely than other people do. I can't comment on whether she's high or not, and she sounds a bit out there, but I don't have a huge issue with what she did either. Could just be me though...it's been some time since I've had a baby, so maybe I'm just forgetting!