No, it is completely unethical. Watching or being interested in someone's sexual story without their consent, especially an ex - wife, is a serious violation of privacy and respect. Everyone has the right to keep their sexual experiences private.
Definitely not. It's inappropriate and disrespectful. Your ex is an individual with their own privacy rights. Even if you have a past together, that doesn't give you the right to peek into their sexual history. This behavior can also cause emotional harm to both you and your ex if they were to find out.
No, it is not ethical at all. Watching any form of sexual stories involving your partner without their explicit consent violates privacy and the boundaries of a healthy relationship. It can lead to feelings of betrayal and mistrust in the relationship.
Well, 'ex' is probably your former partner. They might be watching your stories out of curiosity. Maybe they still care about what's going on in your life, or they could be just nosy.