Erm.....I suspect this is an international joke.
So, there is a guy in his final year at University, and he decides to do a thesis on Sheep Shagging. (Strange behaviour, considering he was studying Electronics ... but, never mind ... I digress).
He calls upon a Surrey Sheep Farmer to ask his opinions.
'Well, I gets the hind legs ... stuffs them into me wellies ... and then takes them from behind. That's it.'
'Oh, thank you' says the student, taking copious notes along with sketches etc.
Next he visits a farm down in Dorset.
'What are your view on sheep shagging?' he asks boldly.
'Well, you've got to take the hind legs, stuff them into the wellingtons, and then take the sheep from behind. That's all there is to it'
'Oh. Thank you very much for your information' the student replies, once again scribbling away in his notebook.
The Student, intent on finding out the most about sheep shagging from farmers far and wide, visits Wales.
'How do you sheep shag?' he confronts one farmer.
And once again he gets the same reply. 'Take the hind legs. Stuff them into the wellingtons. Give the sheep one from behind.'
Scottish farmers gave The Student the same answer. Maybe it was something to do with Great Britain or something ... so he travels to Europe.
All across Greece, Turkey, Italy, Austria, France ... no matter where he went he got the same answer 'Take the hind legs. Stuff them into the wellingtons. Take the sheep from behind.'
The Student began to get depressed. No matter where he went, would he ever get a different answer? Surely there must be someone, somewhere, that shagged sheep differently.
He travelled to the Southern Hemisphere.
At New Zealand he obtained the same answer to the same question.
'Take the hind legs. Stuff them into the wellingtons. Take the sheep from behind.'
Finally he manages to find a small outback farm in the middle of Australia. He approaches the sheep farmer and explains his predicament. Gladly the Australian sheep farmer explains his method.
'Well, you get the sheep; throw it on its back; spread its legs and then do the business.'
'Eh? ... ' replied The Student, incredulously. 'You don't put the legs in the wellingtons and take the sheep from behind?'
'WHAT!?', says the Aussie Farmer ... 'And miss out on all the kissing??!!!