Harry was humping from the day we got him at 8 weeks, which I was amazed at. Then he went period of nothing, then other dogs would try and hump him and full circle he's started humping again. Also in the mornings I am privileged to have a wagging tail and the lipstick out to greet me, but OH doesn't seem to arouse the same feelings from him.
He's just had the snip today so not sure whether he'll hump anymore or less. As for cocking his leg for a scoot, at 7 months he's yet to do it.