I will follow this up. I'm guessing that by clean, you mean no porn. However, your search history, even in a professional context, can say a lot about you.

  1) Search stack traces on google much? You are probably a developer. 

  2) Visit buzzfeed, vice.com, or other news sites, even on your lunch or coffee break? Click on certain stories that might skew to a male audience? 

  3) Have facebook or twitter open? Then you've just handed them the keys to the demographic kingdom.

Believe me, even at work the ad-networks know, at minimum, you are probably male -- hence -- boobs.

C'mon -- is it really that big of a deal? Since when did a little skin or innuendo become "unprofessional?"

When the US was populated by puritans from Europe ;)

No, I don't think that is it. This hyper-sensitivity happens in Europe as well.

It is a generational problem, mostly for the mellenials.

They have been brought up in a toxic and rigid culture multiculturalism and political correctness.

But I'll stop here before it really spirals down into non-HN territory. :-)

Are you serious?

Yes, I'm serious.