I remember Jasper Carrott, in his book entitled "sweet and sour labrador" (I wonder if it's banned in Korea), called it 'humping' and in the book he tells of an embarrassing moment in his early twenties when, I think I'm right in recalling, he drove a fish and chip van to make ends meet. He entered into a relationship with a very posh girl who took him home to the family pile to meet mama and papa.
While they were sitting in the opulent lounge after lunch, there was a lull in the conversation as the dog sat up from its place in front of the fire place, stretched its neck to its full capacity and then turned it almost a hundred and eighty degrees before plunging it between its hind legs where it began to lick its balls. The lull continued as the family sat and watched this display of canine dexterity. It was then that jasper, unnerved by the silence, piped up with, "My goodness, I wish I could do that," to which mama (all tweed and pearls) replied, "If you give it a biscuit, Jasper, I daresay it will let you!"