I once bought a friend a pineapple pizza that he didn't eat at all, because he hated the stuff. I meant it kindly.
This happened in Iraq, in 2008 or 2009. My friend was a Warrant Officer in the US Army, and I had recently observed him -- on a trip to Victory Base Complex, where there were multiple Pizza Hut trailers as well as a real-life pizza restaurant on the west side -- to bring back several pizzas, including a Hawaiian pizza. This kind of pizza is not really Hawaiian. It's actually Canadian.
Anyway, I assumed he wouldn't have bought the thing if he didn't like it, so the next time I got over there I brought one back for him. He thanked me very kindly, and never once mentioned that he hated the idea of pineapple on pizza. I only found that out later. I felt bad at the time, although the only sad thing was that I guess the pizza was wasted. He appreciated that I'd tried to do something nice for him, and that was the really important thing.
I personally like very many things on pizza. This attitude is described by the author from the first link as proper to "[o]thers from pizza wastelands such as Australia and Atlanta [who] extolled the virtues of complementing pineapple and ham with even more revolting toppings such as... jalapenos." Why, yes, I would also like jalapenos on that pizza.
I mean, where pizza is concerned, I'm fairly broad-minded.
In any case, I didn't bring this up to offer a binding opinion on the question of what ought to be on a pizza. I was just appreciative of the occasion to remember a friend I haven't ever seen since he boarded a helicopter on FOB Falcon, to rotate back to Germany after a long and honorable service in Iraq. I hope he's doing well.