I've come across a Dad in the local park who once weirdly sort of patted my daughter's back when she was crawling past in the playground. Recently at at toddler group I saw the same Dad picking up someone else's kid and putting her on a chair and also messing about withanother kids hat. Strikes me as wierd I never really touch other people's toddlers unless to stop them falling over or falling on another kid. I think he shouldn't do this. AIBU?