Earlier quoted context omitted.
2 people in a shower doesn't effectively decrease water usage per person, and the logistics overhead would eat into the 4 minutes.
If done with someone you find attractive, that also finds you attractive, 2 people to a shower, that want to participate in this shared activity of showering together, increases this thing called "fun". (Both parties wanting to participate is requisite for this "fun" to happen. If one or both parties does not want to, this "fun" does not happen. Even if both parties want to, that is not a guarantee that "fun" will ha…
Ummm about that XD