Kaj: But if they were made into orgasmium, even for a short while, then they wouldn't want it to ever stop...

Well, yeah, but most people, if they had their brain removed and replaced by a slab of jelly, wouldn't raise any objections either.

I don't think wireheading is that different. A wireheaded brain is basically a hacked brain that doesn't work any more.

(you could also replace "made into orgasmium" by "given heroin")