I've learned to keep my mouth shut but a few are:
I think OW/OM are as culpable as a cheating partner
That someone saying "you must be a man" is not the immense insult it's used as, for balance I've also been called a man hater too so I must be doing something right to be so balanced in my obvious pure hatred of humanity in general😆
I think you can disagree about a subject respectfully without resorting to insults
That kids over 18 need to pay something towards the household and find a job. Also that it's their home but it's not their house, they get a vote, they do not get a veto.
That children should have no say in your romantic life unless you or your partner are being an arsehole to them
That egg sandwiches are fucking great
That there is no such thing as a introvert or an extrovert, we are all ambiverts
That you can share a table or a bench in public