Text: Dating is a pain, and sex with strangers is iffy--not only because of HIV, but also I've been told that hepatitis C (spread in the same ways as HIV) will kill more people in 1999 than HIV.
Entailment: Considering the specter of diseases like HIV and hepatitis C, dating or even just hooking up can be fraught with worry.
Contradiction: Unprotected sex with strangers is free of dangers.