Wasn't Gene on record how he prefers symetric body basses with two horns (LP Junior, Grabber/Ripper, Punisher) to one-horn basses (his blade axe being an exception purely for visual impact, not ergonomics)? Addding helpfully that in the animal kingdom two horns rather than one are the rule too - he obviously never saw a pic of a narwhal(e) ...
https://www.nationalgeographic.com/news/2017/05/drone-footage-narwhal-tusk-mystery/Well, I guess a TBird (which I think he only played in the past once - in the Phantom movie) is a "no-horn", so albeit non-symetric it defies the above classification.
And of course, the narwhal(e)"tusk" is actually an elongated tooth (used to daze prey fish by hitting them over the head as I've now learned from the above vid), not a horn.