Here's a thing to keep in mind before you start reading this list: Not everyone who reveals sexism is doing it maliciously. We've all – men and women alike – grown up having internalised certain stereotypes and ideas of what roles each gender plays in a home, in a workplace, and in a relationship.
The best we can do when sexism comes from people who love us isn't to respond with anger (unless you have good reason to believe it's deliberate!) but to start a productive conversation to deconstruct why we believe the things we believe, and how we can undo the conditioning that harms us.
Now you're ready. Carry on.