The one line Google ads on GMail seem to be to be getting borderline inappropriate
In an email chain about someone (no-one you know) splitting up "Love Relationship
Advice - CatchHimAndKeepHim.com - 9 Ugly Mistakes Women Make The Ruin
The Perfect Relationship"
There was another borderline inappropriate one recently in some circumstance where I would have thought the algorithm would have blanked all ads. Can't remember exactly what, someone's bereavement?