Exploiting a Minotaur's horns

[nickl_2000]

Well... you could use it with a shield and a 1-handed weapon, so you can use your horns as your main weapon and use the 1-handed as the off-hand weapon without having to stop using your shield.

You can't even so that, the phb states that when you make an attack with a light melee weapon, you get a second attack with a light melee weapon as a bonus action.

The horns are a natural weapon I believe, so I don't think they qualify. Or if they do, you at least need dual wielder.