I see posts constantly about how it's cheating if your SO looks at another girl or likes a picture or texts someone.

how they can't have female friends cuz it's disrespectful.

what if they're bisexual? can they just not have friends at all? like no human pictures? not look at anyone? what's your logic? is it cheating to look at a celebrity or like their picture? watch a sex scene in a movie? I don't understand the insecurities and I've been cheated on the past.