This is expressed as Moisture Content or Water Content
Most food items have a water content. Even seemingly 'solidified' foods such as a piece of bread or bun have a certain water content in them.
For vegetables and fruits, the water content as a percentage of the weight can be huge.
For example, fruits such as Watermelons contain 92% in every bite with just 6% sugar and 2% fiber by weight.
I think it is ethically appropriate because he's taking a real thing that's happening and talking about it. It's giving him a topic to say about that might allow others to connect with or understand. Also depends on the topic
