In multivariable analyses including the nine high risk factors and one additional factor (level of schooling, which was marginally associated with withdrawal, p = 0.09), only the associations with young age, unmarried status, frequent intercourse, enrollment at a university center, and enrollment at a center with a lower recruitment rate remained significant.
Sex didn't evolve just for reproduction; rather, "continuous and frequent intercourse... is genetically adaptive: it ensures that the woman and her child have help from the father".
In turn, the impact of this more frequent intercourse on condom use may be somewhat greater than results would indicate, as the uncounted numbers may represent commercial sex workers with a relatively high condom use.
It is also reasonable to suggest that attempts to undertake frequent intercourse for the duration of the cycle (NICE, 2004) may prove excessively demanding and thus as emotionally challenging as timing intercourse to the fertile period.
Frequent intercourse will increase the chances of contracting a urinary tract infection.
This means having sex around day 12, day 14, and day 16, although frequent intercourse will lower a man's sperm count.
It is worth noting that one of the two MRSA carriers reported frequent sexual intercourse with other men.
In the bivariate analysis, for females, any dating violence victimization was associated with depressive symptoms (feeling down/hopeless, having little interest in doing things), disordered eating (taking diet aids, fasting, vomiting), smoking daily for 30+ days, and frequent sexual behavior (vaginal intercourse with 5+ partners, oral sex with 5+ partners, and anal sex with 1+ partner) (Table 4).
It was shown that frequent unsafe injection practice (sharing needles and syringes once a day or more) and frequent unsafe sex (intercourses with 'sometimes or never' condom use) with casual partners were significantly associated with HIV infection, while with commercial sexual partners intercourses with 'always or often' rather than infrequent condom use showed significant association.
Surgery was associated with frequent group sex (OR = 5.69; p<0.001), more than twenty sex partners in the previous twelve months (OR = 3.70; p = 0.008), frequent receptive (but not insertive) anal intercourse with non-steady sex partners (OR = 3.32; p = 0.015), and particularly with having HIV-positive non-steady sex partners (OR = 7.56; p = 0.002), but not with fisting or age.
