A new army captain inspected the soldiers in their barracks.
He noticed a female horse.
Captain: what’s that horse for?
Soldier: our men use her if they feel an urge to have sex.
Captain: ah, it is ok. (One night, the captain feels an urge, so the soldier brought the horse to his tent. the captain fucked the horse. after that, he saw the soldier smiling Outside his tent)
Captain: it’s so hard! How do you do it?
Soldier: we ride on the horse to the next town where the girls are.