'Taste' in the Bible

Then they came to urge David to eat bread while it was still day, but David took an oath: “May God punish me and do so severely if I taste bread or anything else before sunset!”

I’m now 80 years old. Can I discern what is pleasant and what is not? Can your servant taste what he eats or drinks? Can I still hear the voice of male and female singers? Why should your servant be an added burden to my lord the king?