Feeble Attempt at Humor

Well, another feeble attempt at humor! We celebrated my wife's birthday this week at Hector's Mexican Restaurant, here in Chula Vista, California. The mariachi's there know us very well and they came over to play Las Mananitas for my Brazilian wife, Dinéa. Then they played Frenesi, singing it with great gung ho gusto. At all the points where they sang the word "Frenesi!," I tried to be the funny guy and chimed in with them "Tennessee!"  A couple of kids sitting with their family near us giggled a bit, but when the song was over one of the guys who plays a trumpet leaned over and whispered, "Your Spanish is pretty good, but you mispronounce some of the words. It should be Frenesi, with an F and an R. You make it sound like a T."