Hi Julie!
The taste of pee can either be attractive or really off-putting, depending on the person. I'd suggest that you start by tasting pee that's extremely diluted, by having the person who's pee you'll be tasting drink lots of water beforehand - the clearer the urine the less taste/flavor it will have. A person's pee early in the morning will be the strongest, as it's been stored in the bladder for quite a while and is usually fairly stale - avoid it if you're concerned about not liking the taste. It's been said that drinking pineapple juice or other similarly sweet beverages/juices can