Not understanding boundaries and not having/setting them and respecting others'.
You don't owe shit to anyone and if they make you feel bad, they are often manipulating you. What you choose to do needs to be a hard yes from yourself otherwise its going through motions and can often be inauthentic which is inherently harmful to your sense and integrity of Self
People naturally test these limits and breach them all the time so it happens but you must train yourself to assert your will for yourself and how you respond to trespasses by setting those limits and then strongly upholding them when it comes time to address the opposing force, definitely for those who continue despite knowing the rules of the game you've set for yourself
to combine all 3 of the above, i worked with a joe rogan bro who would come up and show me a video of him having abusive sex with a hidden camera footage that the partner wasnt even aware of, to brag about his weekend conquest, then tell me how he stole her soul with surprise anal. then he dared me to show him something better next week.
I'm not sure why this is a thing more men do, but I can't agree more. Generally, I associate this kind of behavior with poor emotional intelligence so good advice for literally any kind of relationship with anyone.