Longetivity and good health are not synonymous. There are reports that healthy sex life is a boon for couples. People with good sex life remain mentally and physically healthier. Doctors advocate sex life with a loyal partner. Safe sex too is advertised.
Some groups advocate abstinence from sex for health issues. They claim that sex reduces health and longetivity. Everyone is entitled to their views. But please remember that healthy life involves several things and sex is just one of them.
Going out for paid sex is suicidal. The risk of STD including HIV are multiplied manifold following unprotected sex with commercial sex workers. Masturbation is advocated as a safer option.