Who am I.

Not quite sure if I have posted this before but here goes.
Still makes me chuckle.
...........
One Monday morning the postman is driving through the neighbourhood on his usual route. As he approaches one of the homes he noticed that both cars were in the driveway. His wonder was cut short by Bob, the homeowner, coming out with a load of empty beer and wine bottles.

"Wow Bob, looks like you guys had one hell of a party last night," the postman comments.

Bob, in obvious pain, replies "Actually we had it Saturday night. This is the first I have felt like moving since 4:00 am Sunday morning. We had about fifteen couples from around the neighbourhood over for some weekend fun and it got a bit wild. Hell, we all got so drunk around midnight that's when we started playing 'WHO AM I.' "

The postman thinks a moment and says, "How do you play 'WHO AM I?' "

"Well, all the guys go in the bedroom and we come out one at a time with a sheet covering us and only our 'privates' showing through a hole in the sheet and then the women try to guess who it is."

The postman laughs and says, "Damn, I'm sorry I missed that."

"Probably a good thing you did," Bob responds. "Your name came up seven times."