This is the goal of the Sex Positive agenda. End ALL moral judgements over sexual pairings regardless of sex, age, relation, marital status, number, or species of partner(s).
Sex Positive proponents oppose abstinence not because "it doesn't work" but because they see sexual pleasure as a birthright and seek to see everyone sexually active at every age. They see abstinence as "unhealthy" because it is a supression of sexual desires.
I think that it is positive.org that has a campaign called "just say YES" because there are too many stuffy adults already telling kids what they can and cannot do.
The Sex Positive agenda has been defined by Kinsey, Reich, and feminists.
People who say sex is healthy, holy, natural, marital, sensual, significant, meaningful, spousal, tender, passionate, sacramental, fertile, frisky, and fun should claim the term "Sex Positive."
People who say sex is temporary, impersonal, insignificant, triflin', sterile, shallow, prophylactic and skanky, should be termed "Sex Morons."
That's my contribution to the Keep It Real Dictionary.