invites

A woman spotted a quiet looking but attractive man across a 
crowded room at a convention in Las Vegas. Easing up next to 
him, she asked him if he would like to join her for a drink. 

"I don't know," said the man. "I've got a wife and two kids 
at home." 

She replied, "Who's it going to hurt? I don't know you, you 
don't know me, they don't know us, and we don't know them." 

The man thought about it for a second and then agreed. A few 
drinks later, the woman invited him up to her room for a 
nightcap. 

When he hesitated again, she said, "I don't know you, you 
don't know me, they don't know us, and we don't know them." 

So he agreed. 

After a few more drinks in her room, the two of them were 
starting to get pretty friendly. She cooed in the man's ear, 
"let's get this party rolling..." 

Bewildered, the man exclaimed, "If I don't know you, you 
don't know me, they don't know us, and we don't know them, 
then who the hell are we going to invite?"