I agree with the other two ladies who have spoken.
There are red flags. Yes, education is a big part of it in order to recognize what is an unhealthy relationship and who is acting in an abusive way, but also, men have a particular need to call out other men when they are saying something inappropriate. You don't make sexist jokes. You don't laugh and make it okay to behave like that or say the things you do, because everything just builds.