Special wine tasting ability

On his first date with a beautiful woman, a bloke decided to impress her with his abilities in wine tasting. He told the wine steward to bring a bottle of 1985 Sterling Cabernet Sauvignon from the Carneros district vineyard. Upon tasting it, the young man berated the wine steward. "No, no, no! This is a 1987 vintage from the North Coast vineyards near Calistoga. Please bring me exactly what I ordered."
The second bottle was poured and, once again, the man was very annoyed. "No, no, no! This is 1985 all right, but it's from the Mount Helena vineyards!"
Watching the drama from the bar, an old drunk staggered over to the couples table and said, "Wow! That's an impressive ability you've got. Can you tell me what's in this glass?"
Not wanting to pass up an opportunity to impress, the man sipped at the drunks glass. "Christ, that tastes like piss," he yelled as he spat the mouthful out.
"That's right!" exclaimed the drunk. "Now tell me where I was born and how old I am."