the cartoon is not sexist! The cartoon is highlighting and decrying casual sexism.If the cartoon was presented in a discussion about sexism and presented in a way that it says "look, that's how sexist people think", then it might be perfectly ok and maybe even funny for everyone. Well, except for the sexists! ;-)
But I'm not sure if everybody really read it like that. I didn't. But probably also not the sexists. They just enjoyed the boob job mentioning.
You had to explain the intention of the comic.
It was mentioned before it's all about context.
I know that some people are sexist and I would prefer not to be reminded of that in this way in a technical discussion, especially if it's not sure that the intended message gets across.