Quoting m o m ♥:" I Taught him sitting. Started teaching st 2 yrs never showed interest until he was 3yrs he peeded standing ... [snip!] ... being trained. I have no advice I tried everything but it wasn't until he was ready that we got anywhere with it Good luck"
Quoting 3 little monsters:" My 5 year old sits to pee. He used to stand because our old house in Japan had a urinal in the bathroom ... [snip!] ... is gone a lot now but I kinda figure whatever. Doesn't matter much to me how he pees as long as it's getting in the toilet. "Yeah, I don't mind him sitting as long as he wants really, I'm so worried about when he does start peeing standing up that he will miss the toilet... lol. I want him to have good aim before trying standing.