Holway Giuseppina Valle
Int J Sex Health. 2015 Jul 1;27(3):351-367. doi: 10.1080/19317611.2015.1014954. Epub 2015 Mar 9.
Most previous studies on sexual initiation timing have examined its effects on a variety of subsequent outcomes without first examining the correlates and predictors of these timing categories. Studies that do exist often do not utilize samples through young adulthood, leading to a misclassified set of sexual timing categories. In addition, the literature does not adequately address the issues of oral sex timing. Therefore, the objectives of this study were 1) to explore age-cutoffs that mark the "normative" and "non-normative" entry into vaginal and oral sex among young women and men in the U.S., creating sexual four sexual initiation timing categories - "early," "normative," "late," and "inexperienced," and; 2) to examine the association between race/ethnicity and sexual initiation timing by gender.
The National Longitudinal Study of Adolescent to Adult Health (Add Health) was used in both descriptive and multivariate contexts to determine the net association of gender and race/ethnicity with vaginal and oral sex initiation timing.
Age-cutoffs for vaginal sex timing were similar for women and men, yet differed by gender for oral sex timing. Women were more likely than men to initiate vaginal sex (20% vs. 18%) and oral sex (19% vs. 16%) at an early age and less likely than men to initiate these behaviors at a late age (18% vs. 19% for vaginal sex, and 15% vs. 16% for oral sex). Although most respondents initiated these two behaviors by young adulthood, a considerable proportion remained inexperienced, with men more likely than women to report inexperience with vaginal sex (7% vs. 5%), and women more likely than men to report abstaining from oral sex (8% vs. 6%). Race/ethnic differences in sexual initiation timing remained robust in the face of controls for both women and men.
Understanding the timing at which adolescents and young adults transition to first vaginal and first oral sex is critical for sex education curriculum and policy makers.
以往大多数关于首次性行为时间的研究都考察了其对各种后续结果的影响，而没有首先考察这些时间类别相关因素和预测因素。现有的研究往往没有涵盖整个青年期的样本，导致性行为时间类别分类错误。此外，文献中没有充分探讨口交时间的问题。因此，本研究的目的是：1）探索划分美国年轻男女开始阴道性交和口交的“正常”和“非正常”年龄界限，创建四个性行为开始时间类别——“早”、“正常”、“晚”和“无经验”；2）按性别考察种族/民族与性行为开始时间之间的关联。
使用青少年到成人健康的全国纵向研究（Add Health）进行描述性和多变量分析，以确定性别和种族/民族与开始阴道性交和口交时间之间的净关联。
开始阴道性交的年龄界限在男女中相似，但开始口交的年龄界限存在性别差异。女性比男性更有可能在早年开始阴道性交（20%对18%）和口交（19%对16%），而在晚年开始这些行为的可能性比男性小（阴道性交为18%对19%，口交为15%对16%）。尽管大多数受访者在青年期前就开始了这两种行为，但仍有相当一部分人没有性经验，男性比女性更有可能报告没有阴道性交经验（7%对5%），而女性比男性更有可能报告没有口交经历（8%对6%）。在对男女进行控制后，性行为开始时间的种族/民族差异仍然显著。
了解青少年和青年向首次阴道性交和首次口交过渡的时间，对性教育课程和政策制定者至关重要。
