The social media trend was sparked after Beckham was criticised for kissing Harper on the lips on her fifth birthday.
People commented on the photo calling it “pervy” and “strange”.
However, since the debate kicked off, many parents have chosen to support the fashion designer mum by following suit.
“If this is wrong, I don’t wanna be right,” one mother wrote alongside a photo of her kissing her daughter.
See the parents showing their support in the tweets below.