When three drunks showed up at the local brothel, the madam of the house knew they'd be unable to perform.

One by one she sent them up to a room containing a bed and an inflatable rubber female doll. The first drunk returned bragging about what great sex he'd had.

The second one did the same thing, but the third one returned with a bewildered look on his face and explained, "I thought I was doing OK until I bit one of her nipples, she broke wind and flew out the window!"