HIV is a smart virus, but it would be smarter if it made all its victims horny. Rabies has it right. The infected animal becomes aggressive so that the rabies virus has a better chance of getting inside more bodies and thus extend its collective lifespan. HIV ought to tinker with the mind a bit so that within a short while, those infected behave like they’re on ecstasy. Imagine how much more quickly the disease would spread if people who were HIV positive had nothing but sex on their mind, and total disregard for the well-being of others!