What is "very long"? I do think if a guy can only last a few minutes in bed and doesn't have control beyond that, it could use some intervention or help in achieving better length of time..if it dissatisfies you or your partner. Don't worry too much about comparing yourself to others, though. I really don't think there's a standard to this. There is loads of info online about being able to last longer, different tips and tricks, so you might try that too.