It seems that people forget about personal boundaries when they're around me! I visited my mum at her work when her manager (an elderly woman) commented that she could see my belly button poking through my top and then flicked her finger over it, with out thinking about who she is I replied with "my nipples also poke out constantly too would you like to flick them as well". I don't care who you are but unless I say other wise it is not ok to touch!