I bathed and showered with my father up until the age of 6. Then after that time, it became very uncomfortable for me. Although I'm not a total prude when it comes to nudity, I do have a problem seeing my parents and sister naked (and vice versa) in any situation and I avoid it as much as possible.

But when it comes to non-family members, it doesn't bother me at all. The majority of my friends (both male and female) have seen me in my birthday suit in a given time and place and it doesn't bother me one bit like the way it would if my family saw me naked.