Questions That Do Not Get Asked

In 2008 (when this survey was completed), it's terrifying:

A total of 4,403 (54%) participants reported having unprotected anal sex with a male partner during the past 12 months. Of the 8,175 participants, 37% reported having unprotected anal sex with a main male partner, and 25% reported having unprotected anal sex with a casual male partner.
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A total of 3,042 (37%) participants did not know the HIV infection status of their most recent male partner. This was more common for casual partners; 53% of men whose most recent partner was a casual partner did not know the status of that partner, compared with 19% of men whose most recent partner was a main partner.

And yet another reason why you should change sexual partners far less often than you change cell phones:

 Fourteen percent of the men surveyed (1,109) also reported having anal, vaginal, or oral sex with a female partner (Table 4). Of men who had sex with both male and female partners, 20% engaged only in oral sex with their male partners, and 4% engaged only in oral sex with their female partners. Of the participants who had sex with both male and female partners, more had unprotected vaginal or anal sex with their female partners (63%) than unprotected anal sex with their male partners (54%). However, among men who identified as homosexual, more had unprotected anal sex with male partners (65%) than unprotected vaginal or anal sex with female partners (54%). 

The survey was asking behavioral question about what is now called MSMs: Men who have Sex with Men, because many men who have sex with men do not consider themselves homosexual or bisexual.   (Some of us consider them university football coaches.)