Examlex
When no reasonable sampling frame exists and a probability sample cannot be drawn,at least estimates about the sample accuracy are available through nonprobability samples.
Men
Adult human males.
Sexual Intercourse
A physical act between individuals that involves genital contact and can lead to reproduction and the expression of intimacy.
Sexual Behavior Study
An area of research focusing on how and why individuals engage in various sexual practices, exploring aspects like frequency, preferences, and psychological implications.
Heterosexuality
Sexual attraction or sexual behavior between persons of the opposite sex.
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