Doing what comes naturally.
In Andalucia where the sun shines all day, men in black boaters wearing tight trousers, smart waistcoats and hand made leather boots ride only stallions to ferias (fiestas) and behind perch their young pretty skirted women sideways on the rump of their long silky haired horses. Meanwhile the mares, kept for breeding, stay at home in pens along with the young stock in case powerful hormones cause mischief amongst the numerous stallions on parade.
In Britain where the grass grows green, women in black protective hats wearing tight breeches, silk scarves and long riding boots ride either mare or gelding and keep their men to perform the manly chores. It is custom to keep superior stallions for insemination only and colts are gelded as a matter of course. After all the syringe can always be filled with samples sent by post from the freeze bank.
It is the outbreaks of frenzied excitement doing (or even thinking about) what comes naturally which can breach the peace and causes pandemonium, especially in the Spring. Or was it just the effect of new, fresh, green grass!
But just who should leave the Garden - the stallion or the mare? After all, both parties eat apples.