To be absolutely brutal and honest with you, nobody cares about I look forward to hearing from you.. The practical reason is that it's one of the various standard and conventionally polite ways to end the body of the letter. It's just a standard exit.
1 In some cases, liver failure causes this taste to occur. 2  Gastroesophogal reflux disease can cause the salty taste (even when no pain is present). 3  Some medicines can make everything taste odd. for example the drug enalapril, which is a drug used to prevent heart failure.
Diabetic neuropathy can also cause this problem of experiencing sweet sensation in the mouth. Treatment : You need to consult your doctor if you start sensing constant sweet taste in your mouth. He would find out the underlying cause for this problem which is only a symptom of some other disease.