Getting to know the language......the embarrassing way

So, I had just arrived in the house and was greeted by the words  "¿Estas vendiendo Vino, Señor?       Well, I understood that I was being asked if .....I was selling wine...... but what was the context? Had I forgotten something....perhaps a birthday....should I have brought some wine for tonight......  So, I had to ask  "¿Que?"...." ¿Que pasa?" The reply was very slow and very deliberate with a lot of mirth from all the Tinerfenians, "¿Estas vendiendo Vino, Señor?"           Now, hopelesslly confused by..... by a lack of understanding.......it was one of those moments!!       A long pause ensued.......... while sniggers and embarrassed laughs abounded.       Then Alexis sidled up to me and said "Tu cremallera esta abierto, Señor"  .....   it took a second or two for me to realise that I had walked in with my ZIP undone !!!     OMG..... the room erupted and I went bright Red............                  So, now you know what     "¿Estas vendiendo Vino, Señor?" really means....      What a great language!    So descriptive!          Now where's the nearest bottle, I need a drink.