"Certainly! I... Huh." He furrows his brow, thinking. "This is actually more difficult than one might think. However, I am not inclined to give up, so I will come up with something. I can obviously immediately discount a correlation between temperature of water and temperature of personality, because that falls apart upon being so much as glanced at. I could easily say 'cold water people somehow actually prefer cold water', but that's far more redundant than I prefer in my truisms. Of course, easy categorization systems tend to fall apart when looked at anyway, so accuracy might actually be a downside, because if inaccuracies slip in, it makes for a much more vibrant conversation topic. Therefore I clearly don't need to think about this with too much diligence, and I will just say that cold water people have in general more tolerance for hardships than warm water people do."