Which sexual behaviour does not seem to vary across social class?

Question

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According to research, the percentage of people who had intercourse in the last 12 months does not seem to vary significantly across social class. Other sexual behaviors, such as the age at first intercourse and STI rates, have been found to vary based on social class. The percentage of people who have ever had intercourse may also vary, as some studies have found differences in sexual experience based on education and income levels.

Which Sexual Behaviour Does Not Seem to Vary Across Social