Apologies if this one has been on b4,found it quite funny...

A rather confident man walks into a bar and takes a seat next to a
very attractive woman. He gives her a quick glance, then casually
looks at his watch for a moment.

The woman notices this and asks, "Is your date running late?"

"No", he replies, "I just bought this state-of-the-art watch and I was
just testing it."

The intrigued woman says, "A state-of-the-art watch? What's so special
about it?"

"It uses alpha waves to telepathically talk to me," he explains.

"What's it telling you now?"

"Well, it says you're not wearing any panties..."

The woman giggles and replies, "Well it must be broken then because I
am wearing panties!"

The man explains, "Damn thing must be an hour fast."