Feminists

Men are generally physically stronger, and anthropological study of human social structures and gender roles is IMO fascinating subject. According to those studies, male protection is very much about protection of females against other males - primarily against other males stealing food from females and secundarily against rape, which together with our ecological niche as cooking species led to family structures as basis of human social organization. On community level, males have had primary responsibility of protecting the tribe against other predators and other tribes.

"Commodity" is much later development of human cultural evolution than male protection, originating in agrarian (patriarchal?) societies, whether applied to land, cattle, slaves, females, etc. etc. etc.

Are you absolutely sure you want to reject the instinct/cultural pattern of male protection in all forms? If I see another male stealing food from a female or raping a female using his advantage of greater physical strength, I should not protect that female because I'm male and that would be condescending and degrading to feminist pride and autonomy?

***

Second, I come form culture where full nudity is much more common than in puritanic America and both sexes often enjoy sauna and swimming together. Penis size is not an issue, I've never heard of local male avoiding sauna and swimming because of small penis.