This writer wants to know how to teach their male dog how to lift their leg to pee.

I do think it’s possible to teach a male dog to lift their leg or to not lift their leg.  It is some thing that can be learned either way.  I used to raise guide dogs for people with sight problems and we worked hard to make sure the male dogs never lifted their leg when they urinated.  (We didn’t want them marking territory in inappropriate places.)  The way we did it was to make sure there was never a high object nearby when they urinated – it was always in the middle of the yard.