I mean... my mother and father categorically did not walk around naked in front of me and my sibs. That's fucking messed up.  I think this largely depends where you're from.  If you're in Finland/Sweden you'll be naked with your family in saunas often.  Or if you came from a small place in  northern UK, like I did, you'd be naked in front of your families because you're poor and your house is too small. Being naked in front of familiy members is natural, normal, and not at all a surprise - unless you're a little repressed and/or American.  (I hate making stereotypes, but it does seem to be USA which is in this weird state of nudity==bad.)