A little fun fact about the demons in our world settings: They are reeeeeeallly sensitive about their horns' size. The bigger and longer means they have more power, more strenght, also they are fighting with them (Like normally animals with horns in the nature) and help a lot in their lovelife too.
+ their horns never stop growning
Unfortunately Dante's horns didn't growed in the normal way, they are growing, just.....slowlier. That's his weakpoint as well, he is incredible sensitive about this topic.
This little scene is from his teenager years, when he tried to solve this problem :"D
In the background you can notice Sámson too (he is in the middle) and Dante's future brother-in-law, future king of the Demonlands (he is on the right)