(1) Being engaged is no longer a necessary condition for premarital coitus , and sexual activity has become a common aspect of adolescent relationships.

(2) Women's health advocates have argued for a long-acting hormonal method that is under the control of women, does not require daily attention, and is not coitus related.

(3) Only 6.4% of the coitally experienced male adolescents reported that they had ever used a condom for coitus .

(4) In recent decades at least, virginity loss has by and large been defined with reference to physiological rather than to moral criteria, and has been specifically equated with first coitus .

(5) Painful intercourse has been found to reduce frequency of coitus in a large community-based sample of menopausal women.

(6) In fact, initiation and frequency of coitus are often the only aspects of sexual behavior that are measured.

(7) Although having first coitus in a noncommitted relationship or at a young age had a negative effect on how both males and females were evaluated, the negative effect was greater for females.

(8) Because no positive relationship has been shown to exist between estrogen levels and sexual activity, coitus is not hypothesized to restore or maintain estrogen in postmenopausal women.

(9) Vice versa, in all three surveys plump women had not had intercourse as recently as lean women, while there was no connection between recent coitus and BMI among men.

(10) Although a natural sexual act, coitus is culturally regulated by legislation, custom, and religious belief.

(11) When interpreting the available data he speculates that many people in the U.S. engage in extramarital coitus despite their belief that this behavior is not morally acceptable.

(12) Results regarding the relationship between age at first coitus and later outcomes, although statistically significant, were inconsistent with the abstinence-only agenda.

(13) There were no gender differences in the proportions of the students who have had a steady date, but significant gender differences in the proportions of the students who had coitus .

(14) The male students who had coitus , who had smoked, who had used alcohol, and who had a steady date reported greater numbers of their friends who might have visited prostitutes than the others.

(15) For instance, surprisingly, fears of the negative consequences of pregnancy or sexually transmitted diseases did not significantly reduce the likelihood of coital debut for either boys or girls in this sample.

(16) Condom use was expressed as a proportion defined on the basis of two items: the total number of coital events and the number of coital events in which a condom was used.

(17) One should also note that the most consistent predictor of coital sex is precoital sex.

(18) Male students who finished their military service were excluded from the sample because they were considered to be adults, under the assumption that they might have had opportunities for coital experiences during their service period.

(19) This rapid ejaculation brings coital activity to an abrupt end and interferes with the sexual satisfaction of both the man and his partner.