Gender. Men are somewhat more heterosexist than women (see part a of Figure 5.3 "Correlates of Heterosexism (Percentage Saying That Same-Sex Relations Are “Always Wrong”)").
Age. Older people are considerably more heterosexist than younger people (see part b of Figure 5.3 "Correlates of Heterosexism (Percentage Saying That Same-Sex Relations Are “Always Wrong”)").
Education. Less educated people are considerably more heterosexist than more educated people (see part c of Figure 5.3 "Correlates of Heterosexism (Percentage Saying That Same-Sex Relations Are “Always Wrong”)").