The idea that adolescent same-sex attraction will always become adult same sex attraction is quite incorrect.  Data from the large USA ADD-Health survey (Savin-Williams and Ream, 2007) confirm that adolescent homosexuality/bisexuality both in attraction and behaviour undergoes extraordinary change from year to year. Much of this could be experimentation. The changes are overwhelmingly in the direction of heterosexuality, which even at age 16-17 is at least 25 times as stable as bisexuality or homosexuality, whether for men and women. That is, 16 year olds saying they have an SSA or Bi- orientation are 25 times more likely to change towards heterosexuality at the age of 17 than those with a heterosexual orientation are likely to change towards bi-sexuality or homosexuality. Under the most extreme conservative assumptions heterosexuality is still 3x more stable for men and 4x for women. The Savin-William and Ream (2007) paper In the following, SSA is used for "Same-sex attraction" and OSA for "Opposite-sex attraction". "Bisexual" or "Bi" is used for those with an attraction to both sexes. Adolescents are notoriously changeable. Does this extend to their sexual orientation? The current popular belief about sexual orientation is that it is innate, probably originating prenatally and will inevitably emerge in a stable form in an individual. Few believe that one attraction can decrease and be replaced by another. The data in this paper however, show that in adolescence attractions both emerge and disappear on a short time scale. The term "sexual orientation" equates to "sexual attraction". Sexual orientation