You can go on a poker run.
You can commute to and from work on a motorcycle... in the snow
Got a passenger that talks just a little to much while you're riding? You could solve that problem with a bridge bike.
You could do it wrong but most experienced riders recommend against it.
If you had an amphibious motorcycle you could... Oh, never mind.
If you're "lucky" you can hit a bear while riding your motorcycle. We don't recommend that for bears or motorcyclists.
Sex on a motorcycle? I don't make this stuff up, people.
And finally, if you're a terrorist you can shoot from your motorcycle