You have to remember that it was in Scotland, not England/Wales and they have some strange sexual habits North of the border along with different laws. Something to do with a sexual conduct likely to cause a Breach of the Peace, which we don't have. I shall check out the new Act to see what might have been an appropriate charge.
I remember my caving club having a paper cutting on the wall of a local farmer having been caught in flagrante delicto with a cows nostril whilst standing on a stool or something. Now he probably would have gone on the register.
Probably rode a Thumper, except then it would have been a rabbit instead of a cow.
Richard