I guess it's a bit of a foreign thing for me. The US is way more puritanical in many respects. 'Lads' mags that portray nudity are classed as one and the same as porn and not out, but available for purchase behind a counter, where you have to ask for them and be 18+.
Sexism is a cause that's actively addressed by the court system, and there seems to be more legislation against blatant gender discrimination there. There's also a lot of PC-ness and regard for 'decency', particularly where children might be around.
That's not to say it doesn't exist, it's just probably more hidden away.
TBH, I was VERY shocked to see newspapers running photos of topless women when I first got here. It was like, 'Whoa! Anyone could have picked this up! Even kids.'
I'd never heard of 'glamour models'. I thought they were women who were maybe too short to be regular models and could only use their faces.
It was even more shocking to find out that some of these gals used flashing their tits to get 'real' jobs, like in TV and such.
Whilst it does happen in the US - Pamela Anderson Lee, for example, who is actually a native Canadian - it's not very common and many broadcast journalists would find their careers in tatters if nude photos of themselves were found.