Why the idea that similar touching of men can't really be done (the "touch my nuts" comment was met with, "no, that couldn't have worked, because that would be too sexual." well the breasts, as it seems to me from that post, were sexual objects.)

While it's true that breasts are, as you say, sexual objects, I'd like to point out that breasts in general aren't as eroticized as the genitals are.
In the original "manifesto" post, the OP mentioned that there was some "equal opportunity" touching was happening in that men were allowing people to grope their asses. The problem, as I see it, is that the available places on a male body to be touched are not sexualised in the same way as a woman's breasts. Thus there is no truly analogous portion of the male anatomy, and there isn't really a way for a man to be touched in a similar way. It's also be why grabbing some guy by the balls would be considered "too sexual" - the balls are more heavily eroticized and sexualized than the breasts, and generally speaking, most people (male and female) need to have a higher level of intimacy with someone before they'll let another person grab their crotch.