Sexy Scarlett Johansson insists she is regularly tested for sexually transmitted diseases and slams people who refuse to get tested, calling their behaviour "disgusting and irresponsible". The actress recently hit back at reports she was promiscuous before finding love with Josh Hartnett on the set of The Black Dahlia last year (APR05). Johansson encourages responsibility when having sex telling Allure magazine, "I get tested for HIV twice a year. "One has to be socially aware. It's part of being a decent human, to be tested for STDs. "It's just disgusting behaviour when people don't. It's so irresponsible."