If I know one thing, and only one thing, as a man (okay, two things) it's these: NEVER joke about a woman's weight and never ask a woman if she's pregnant. The former will never end well. The latter may end with a lovely conversation about her impending bouncing bundle of joy and the perils of newfound parenthood. But it's also just as likely, if not more so, to end in tears and embarrassment.
An employer in the UK just learned these lessons the hard way, and earned my 12th nomination as the Worst Employer of 2021.