"Lisping dwarf" joke

Lisping Dwarf
A dwarf with a lisp goes to an agricultural show to buy a mare. He wanders around until he comes across a beautiful mare inside a small enclosure with a farmer standing at the gate. He goes up to the farmer and says,
"Excthuth me, can I have a look at your horth?"
"Sure", says the farmer, "come on in."
The dwarf wanders round and round the mare and then stops, says to the farmer "Her eyeth, her eyeth, I want to see her eyeth."
The farmer has to bend down and pick up the dwarf to show him the mare's eyes.
"Nith eyeth, nith eyeth, I like thith horth, I like thith horth, I think I want to buy thith horth." Once again the dwarf wanders around the horse, in turn asking the farmer to pick him up and show him the mare's ears and exclaiming, "Nith earth, nith earth, I like thith horth, I like thith horth, I think I want to buy thith horth."
The farmer is starting to get pissed off by this stage because the dwarf is quite heavy.
Suddenly the dwarf stops in his tracks and says, "Her twat. her twat, I want to see her twat!"
The farmer, infuriated, pick up the dwarf and drives him head first into the mare's backside. He leaves the dwarf's little legs kicking and wanders off to talk to his mates for a couple of minutes. He then comes back and extracts the dwarf from his predicament, "SCHLOOOOP!"
The dwarf wipes himself down and says. "I think I better wephrase that...
I'd like to thee her gallop!"