Smoking: I don't smoke.
Drink: Minimal
Drugs: Never
Premarital sex: Yes, but monogamously. As far as HIV goes, it is primarily transmitted by IV drug users, gays, and bisexuals (who like anal sex indiscriminately)...I remember the article about AIDS in Discover magazine in 1985...they said (in a non PC way, god forbid) that AIDS would largely be the price one paid for anal sex. That reality hasn't changed very much. Blood transfusions are fairly safe in the West but elsewhere not because their protocols are ****ed up.