M.B.
I have two boys, and I teach them 90% of what they know. Daddy is the key factor for standing and learning to pee, when that option is there. You can show him and support him, but spending time watching daddy pee, and daddy helping him the first couple times make it eaiser. I grew up with 5 brothers and a single mom, and she did teach them to stand and pee, but it was lot harder and took more time. It was more challenging because they saw her sit, and they mirrored her behavior as all children do of their parent(s). Best of Luck!!!