Combinations are the most effective, so teach the children, abstinence - condoms - hormonal birth control etc is the way to go.
Not really. Masturbation, including mutual masturbation is as safe as abstinence.
Thus only if you feel that spiritual health as defined by sex hating religions is a reality and important, then abstinence first.
Otherwise the question of what to do with your sexual feelings... and the only partners which are available are of unknown health (as well as yourself)... is: masturbation-mutual masturbation-protected sex (condom with additional contraceptive for heterovaginal intercourse).
And if unprotected sex greater than masturbation is desired, then it is best to stick with oral sex, without having a guy cum in one's mouth, and avoid a girl's menstrual blood.
Abstinence provides no additional physical protection.
holmes
"...what a fool believes he sees, no wise man has the power to reason away.."(D. Bros)