A very biased view from the DM as you'd expect. And how typical of them to voice their moral disapproval at the same time as giving us lots of porno images to look at.
Happily the comments responding to the piece help put things in perspective.
Based on very limited experence I would say the defining feature of Burlesque - what makes it different to what you see in a typical strip joint - is its humour. The performer is 'sexy' but also sends up the whole idea of being 'sexy'. Too bad for you if you can't see the joke.
This humorous element explains why - contrary to the impression given by this article - burlesque typically has a mixed audience and also why the performers enjoy what they do.