There are no definitive rules about whether or not guys should wear leather jackets, but there are some general guidelines that can be followed. Leather jackets can be a great addition to a man's wardrobe, but they should be used sparingly and only in certain situations.
For example, a leather jacket might not be appropriate for a formal event, but it could work well for a night out or a casual get-together. When choosing a leather jacket, it's important to consider the type of event you'll be attending and the overall look you're going for.
Furthermore, some guys may feel that leather jackets give them a cool, edgy look, while others may find them too bulky or uncomfortable to wear.
Ultimately, it is up to the individual to decide whether or not they want to wear a leather jacket.