It's important to recognize that making sweeping generalizations about people based on their gender is unfair and inaccurate. Stereotyping all women or all men based on the actions of a few individuals is not a valid approach to understanding human behavior.
People have complex relationships, and friendships between individuals of different genders are entirely normal and can be platonic. It is essential to trust and respect each other in a relationship, and that includes trusting your partner's friendships. Assuming that a woman will cheat just because she has a male best friend is unfair and unfounded.
Trust is a crucial aspect of any relationship. If there are concerns or insecurities about a partner's friendships, the best course of action is open communication. Talk to each other honestly and calmly about any worries or fears, and work together to address any underlying issues. Healthy relationships are built on mutual trust, respect, and understanding.