It is well recognised that there consistent differences in the psychological characteristics of boys and girls; for example, boys engage in more ‘rough and tumble’ play than girls do. Studies also show that children who become gay or lesbian adults differ in such traits from those who become heterosexual – so-called gender nonconformity. Research which follows these children to adulthood shows that between 50 to 80 per cent of gender nonconforming boys become gay, and about one third of such girls become lesbian.
