the opposite sex and become attracted exclusively to the same sex, but the greatest proportion by far has no longer any attraction to the same sex but experiences only attraction to the opposite sex. This is a decrease in same-sex attraction. For the "same sex only" row (also interesting) only a small proportion stay exclusively attracted to the same sex from one year to the next. Some switch to bisexual and experience both attractions, but most experience a large change and become attracted only to the opposite sex. There was no intervention to bring about any changes between ages 16 and 17. It seems life-experiences were mainly responsible. I now show the same results  between mean ages 17 and 22, a five year gap rather than a one year gap. This pattern looks broadly similar. However we have to be a little careful with the interpretation because this is a set of data comparing responses at dates 5 years apart, and we don't know what happened in between. Probably there have been further changes from year to year, decreasing in frequency towards age 22. In other words greater stability with age seems likely. Most of those exclusively opposite-sex attracted stay that way for the second interview. However the bisexual pattern is not quite the same as for the 16-17 year-olds, particularly for women. A significant number again report bisexual attraction. About 75% of men with initial same-sex attraction say they are now exclusively opposite-sex attracted; 25% again report same sex