Here in the UK, sexual harassment and bullying in the workplace are illegal. You and your son were the victims of a premeditated assault. If it were me, I would make a formal, legal complaint to the highest level of management. Maintain the pressure until such time as you receive a full, abject and public apology and promise that there would be no further occurrences to you or anyone else.

I do not believe for a moment that you are the only victim of this idiot's 'wit' - there are others in your workplace who are suffering in silence.

Fact: People do not commit suicide because of the overwhelming things that happen in their lives - it is the small things that push them over the edge. Things like someone laughing at them at work.

If you stop this idiot now, you could be saving someone's life in the future. I am sorry if this sounds too heavy, but I have studied this.

Regards

Chas