Horns are weapons, generally. It wouldn't make much sense for someone's weapons to be very sensitive to touch, since then they wouldn't be very effective as weapons.

yellowbeltl said:

Horns are weapons, generally. It wouldn't make much sense for someone's weapons to be very sensitive to touch, since then they wouldn't be very effective as weapons.

Kinda true. I doubt rubbing the horn would cause this kind of reaction, but animals like cows, goats, and sheep do have something called a cornual nerve which has to be blocked during horn removal to prevent pain, so there is some sensitivity there.