For example, I have more heterosexual friends than gay friends, so it is impossible to ask me to break up with all heterosexual friends after marriage. If the other half really wants this, I think I will end this relationship without saying anything. Not because I value friendship more, but because I can't accept this selfish bondage, because I will have my own principles and boundaries, and I am confident that I won't let the other half misunderstand.
You can chat with friends of the opposite sex before marriage, just like girlfriends. It won't happen again after marriage. It will distance you from each other in behavior, but that friend's friendship will not change. In fact, after you get married, friends of the opposite sex will take the initiative to keep their distance from you, and they know how not to bother you. So having friends of the opposite sex after marriage is nothing to worry about.
Your partner doesn't want you to have friends of the opposite sex after marriage for two reasons: first, male chauvinism. In fact, this is also a manifestation of his love for you. He thinks that if you marry him, it's his and you can't give others any chance. Therefore, cutting off contact is the best way. Second, lack of security. He thinks you are attractive and easy to attract the attention and love of the opposite sex, but he is not confident enough about himself and will worry that you will be taken away by better people.
Married, even if his demands are unreasonable, don't get angry in a hurry and communicate well. Find out his worries and tell him what you think. Let's try to seek common ground while reserving differences. Marriage always has to be compromised, and mutual tolerance and understanding are very important.