Translated that means "Some parents don't want to answer their kids' questions about the human body".
Might also mean that when someone is out having a nice lunch they don't want to be faced with some fatty sweaty lycra-clad pillock's teensy cheesy rollback staring at them from within a pair of shorts that would probably fit a 10 year old rather than the middle-aged born-again tour-de-suburb speedster sporting them. Your mileage may vary but I consider such people on licensed premises to be inconsiderate arseholes.