poorly illustrated nipples on a quickly sketched webcomic page
If people want to go topless then why not, it is not like seeing a persons breasts is offensive or even sexual in most cases.
Given breasts are also all shapes and sizes, then people need to learn this, we are already finding boys have a very misguided idea of what breasts look like from looking at porn, perhaps if people were allowed to be topless (or even naked) we will start to show more respect to each other, be less body concious of every blemish, less sexist misogamy etc, we should stop being so obsessed with how others look and take more interest in people as people and personality.
It may go a long way to ending the mental health crisis we are in with regard to how we look.
I doubt very much that this would cause the akward erections either, as it would be so normal to see breasts anyway that it would not.
I am sure pubecent boys would not end up with erections and bulging eyes (as in staring rudely) if nudity / toplessness was normalised as non sexual.
People need to start to separate sex and nudity for the benefit of everyone.