Sure, this is quite obvious though I did not understand how they could balance out the increase, so I did not even mention this option.
The point about prostitutes was just a thought experiment, and it looks rather far from reality. The second thought experiment about Joan hooking up with Maxwell seems much more realistic, but I don't see why Maxwell wouldn't hook up with someone else the same day. Actually, the more promiscuous side usually takes the initiative, so I'd say it is quite likely that if not for Joan, some other poor girl would get AIDS anyway.
The point about prostitutes was just a thought experiment, and it looks rather far from reality. The second thought experiment about Joan hooking up with Maxwell seems much more realistic, but I don't see why Maxwell wouldn't hook up with someone else the same day. Actually, the more promiscuous side usually takes the initiative, so I'd say it is quite likely that if not for Joan, some other poor girl would get AIDS anyway.