If you read the replies, there seems to be a unsurprising theme considering the artists. It is being sold as ‘body positive’ and some go on to point out people are also anti sexwork if they don’t think this is empowering. 
In fact, one recent experimental mn user keeps piping up to tell people its ok, it about being body positive.
I did like one guy showing the pic to their friends who, from his report back, started rating them before he told them it was supposed to be empowering for women. Rather shows the point nicely.
Also, I did not see my muffin top there. They all seemed to have some kind of waist. The one that didn’t was wearing those boxer brief thingoes.