It's all in the mind. I think it's but correct to not consider it as immoral in some areas, to expose women's breast. I mean, if everyone, especially males, get used to seeing topless girls, then in no time at all, it will become so common that just staring at them will be a very very uncommon behaviour. Perhaps at the start, it's going to be real nice for their eyes to feast on, but seeing bare breasted girls frequently will make you feel like just seeing people not wearing a hat.