Table 7. Descriptive statistics and comparisons across sexual orientations for frequency, number of partners, and age of initiation of oral, vaginal, and anal sex.
| 100% Hetero | Mostly hetero | Bi- Sexual | Mostly homo | 100% Homo | 100% Hetero vs. Mostly Heterosexual | 100% Heterosexual vs. Bisexual | Bisexual vs. 100% Homosexual | Mostly homo | 100% Hetero vs. 100% Homosexual | |
|---|---|---|---|---|---|---|---|---|---|---|
| vs. 100% Homosexual | ||||||||||
| (n = 1631) | (n = 136) | (n = 119) | (n = 23) | (n = 60) | ||||||
| M (SD) | M (SD) | M (SD) | M (SD) | M (SD) | d | d | d | d | d | |
| Frequency | ||||||||||
| Past Year | ||||||||||
| Oral sex | 1.5 (1.8) | 2.2 (1.8) | 2.2 (2.0) | 1.5 (1.6) | 2.3 (2.1) | -0.37* | -0.38* | -0.04 | -0.41 | -0.41 |
| Vaginal sex | 2.1 (2.0) | 2.6 (2.0) | 2.4 (2.1) | 1.3 (1.6) | 0.3 (0.9) | -0.24 | -0.16 | 1.33* | 0.82 | 1.15* |
| Anal sex | 0.3 (1.1) | 0.6 (1.1) | 0.9 (1.6) | 0.9 (1.5) | 0.9 (1.5) | -0.20 | -0.40* | -0.04 | -0.04 | -0.45* |
| Past 30 days | ||||||||||
| Oral sex | 1.3 (1.9) | 1.9 (1.9) | 2.0 (2.1) | 1.4 (1.7) | 1.9 (2.2) | -0.30 | -0.32* | 0.03 | -0.28 | -0.28 |
| Vaginal sex | 1.9 (2.1) | 2.3 (2.1) | 2.2 (2.1) | 1.1 (1.6) | 0.2 (0.9) | -0.21 | -0.14 | 1.23* | 0.72 | 1.06* |
| Anal sex | 0.3 (1.0) | 0.4 (0.9) | 0.8 (1.7) | 0.7 (1.3) | 0.9 (1.6) | -0.07 | -0.38* | -0.02 | -0.31 | -0.41* |
| Number of Partners | ||||||||||
| Lifetime | ||||||||||
| Oral sex | 7.2 (13.4) | 12.4 (17.3) | 13.2 (21.7) | 12.0 (21.5) | 25.6 (30.1) | -0.34* | -0.34* | -0.47* | -0.52* | -0.79* |
| Vaginal sex | 11.5 (18.5) | 14.2 (18.0) | 13.4 (22.7) | 8.0 (12.9) | 1.6 (3.3) | -0.15 | -0.09 | 0.73* | 0.67 | 0.75* |
| Anal sex | 1.6 (5.4) | 2.8 (7.5) | 3.4 (7.6) | 6.6 (12.9) | 10.3 (14.7) | -0.18 | -0.27 | -0.59* | -0.27 | -0.79* |
| Past 12 months | ||||||||||
| Oral sex | 1.0 (2.1) | 1.7 (2.7) | 2.2 (3.8) | 2.5 (4.2) | 2.0 (3.9) | -0.31 | -0.41* | 0.05 | 0.13 | -0.34 |
| Vaginal sex | 1.2 (2.1) | 1.6 (2.8) | 2.0 (3.5) | 2.2 (4.8) | 0.1 (0.4) | -0.16 | -0.28* | 0.77* | 0.61* | 0.70 |
| Anal sex | 0.4 (2.0) | 0.6 (2.0) | 0.9 (2.7) | 2.9 (6.4) | 1.6 (4.2) | -0.11 | -0.22 | -0.20 | 0.24 | -0.37* |
| Age of Initiation | ||||||||||
| Oral sex | 19.9 (5.9) | 17.9 (5.5) | 17.4 (4.7) | 19.1 (5.4) | 18.0 (5.7) | 0.35* | 0.47* | -0.11 | 0.19 | 0.33 |
| Vaginal sex | 18.7 (4.8) | 17.0 (3.9) | 17.4 (3.5) | 18.0 (4.3) | 20.1 (6.3) | 0.38* | 0.31 | -0.53 | -0.39 | -0.25 |
| Anal sex | 25.1 (8.2) | 23.3 (8.0) | 20.3 (7.2) | 25.5 (9.5) | 20.3 (5.1) | 0.22 | 0.62* | 0.00 | 0.68 | 0.70* |
Note. Effect sizes of group differences are based on post hoc tests using Tukey’s procedure. * p < .005. Cohen’s d = X-Y/√((X2+Y2)/2).