I wouldn’t want my young nieces and nephews seeing adults naked in the street, particularly if they are old, wrinkly and fat. In fact I wouldn’t want to see this either. In my opinion there’s something quite pervy about parading around with no clothes in front of people who haven’t consented to see this. By all means take your clothes off in the privacy of your own home but don’t inflict it on others.
Why should naked people of increased age, wrinkledness and/or weightiness, be considered even less acceptable than young, firm and fashionably-sized nude people? Body-shaming of others - be they clothed or unclothed - is never acceptable, and many people would benefit from seeing a very wide range of naked bodies so as to rid themselves of the false ideas held by many, about what is, and what isn't, 'normal' for men and women.
There is nothing whatsoever 'pervy' about naturists either as a group or (on much rarer occasions) in 'mixed' company, and I find it sad that someone instantly links non-sexual nudity with the word 'pervy'.
And if you are offended by, or don't like see, nude people behaving a a normal, non-sexualised manner, it's very simple not to look.
