Have you ever seen a ghost?

An expert in psychic phenomena is giving a conference to a group in Dublin. The speaker asks, "If I may be so bold, has anyone here ever seen a ghost?"

Some people raise their hands. "Good" he says. "Now, has anyone here ever touched a ghost?"

Again, a few people raise their hands. "Excellent. I see we have an experienced group! But... Has anyone here ever had sex with a ghost?"

One little man at the back raises his hand. Intrigued, the speaker says, "Good grief! Do you mean to say you've actually had sex with a ghost?"

"Oh, a ghost?" says the man, "I thought you said a GOAT."