Customer is always RIGHT

Nowadays, it seems like time is at it's full pace. As I am on my sales and service training meeting various customers, listening to their complaints and queries, visiting sites etc. is what my day consists of. Albeit the schedule is very tight the work is full of adventure and demand for perseverance. December 5^th was the first day when I went for customer visit along with one of my friend under the guidance of our Senior Manager of Sales and Marketing. After attending our first customer who was a lenient one and just inquired about the machine specifications and for some price negotiation, we moved to attend our second customer. Before entering this customer's office my sir told me " Abhi dekhna bahut maza ayega". As we entered in his office our sir introduced us to him and the adventure began. At first he asked us why we did engineering??? My friend took the challenge and replied to him by giving the justification that he wants to work with big machines. Although unsatisfied he asked another question why only construction equipment industry?? My friend this time recede and now I have to say something, completely unaware of the coming storm I told him that I like the hydraulics technology that is used in these machines. But this time the lion roared, he pointed that the hydraulic thing can be done with a pump at your home; talking in a manner as it is no big deal for him, I was astound and decided will not say anything except "Aap sahi keh rahe hai". He then moved towards our sir, first made him to listen what he thought of "verbosity v/s dogs" and then asked various questions on machine specifications after few minutes he decided to pull our legs again. Asked a new question what does an engine do?? My decision was firm and I didn't even look at him and my friend has to answer him he told him that an engine convert chemical energy into mechanical energy and provide drive and power. As usual we were wrong, he said " Power to generator deta hai engine ka kaam to ghumana hai wo to bas ghumata hai har chiz ko". My friend looked at me and I said "sahi keh rahe hai". After this both of us use the same incantation to avoid further replying to him and getting our basic totally ripped off. Finally, we came out from his office and our sir asked us "batao kya sikha?". And I said "Customer is always RIGHT".