I think the issue with erections is penis size...it becomes penis envy and people get upset. If the old man wishes to stretch in a spontaneous manner I really can't see a problem with it. It becomes an issue when it gets a helping hand in an obvious sexual manner.
I disagree about 'size' being a factor. I'll be the first to admit that when I come across a well-endowed guy, I am not coy about noticing him. But penis envy shows it's head, (no pun intended) all too often and is 98% of the time seen only by the guy who is harboring it. Ask the women (and men) in your life how they view endowment, I'm willing to bet the responses will consistently be about 'talent', not size. Being 'average' in the bed room is much worse than being 'average' in size.
I find it strange as a nudist that people who come from a NUDIST family find an erection to be such an issue. What I mean is this All nudist family's who have Dads and sons have at some point seen it happen and ignored it. Daughters have seen Dad and brothers and just know it happens. My oldest daughter saw me erect at 9 years oldfor what I thought was the first time since she'd been about 18 months oldI tried covering. She laughed and said Dad that's silly we have all seen you like that why bother. After talking to the kidsit became obvious they were far more observant than I thought. So in our family they became a nonissue. I'm sure this is far more common than most would admit for families. I don't know if its because they're embarrassed about it or think its perverted, but an erection is a normal occurrence for a male. We even get them when we're infants and through out childhood, nobody finds fault with them then. Its only when people know we've reached the age where an erection can bring pleasure that it becomes EVIL. So for me its just silly to look on them as evil and unnatural in a nude setting. Now I am NOT saying its ok to flaunt, exhibit or play with it but if its being ignore by the person who has and could enjoy it the most, others should ignore it also.
yes although I don't use sexual non sexual as distinctions. Bodies are always sexual... in terms of chemistry design and sensation. But sex is a tiny part of human sexuality. Its the act that is framed by the life of the person. erections are habitual as maintenance. they feel good to encourage us to enjoy. that pleasure need not be intercourse or even exhibition. just for its own sake. when we have that pleasure see it as worthy and choose it over reacting to erections with shame or need to fuck we grown