When he ejaculated, quite
without warning, he aimed his penis downward and a small amount of ejaculate landed in my anal region. I moved as quickly as possible to gently wipe it away, and I doubt that much (if any) could have entered my body. Since he said he was negative for HIV, I thought nothing more of it.
This last Sunday, however, I got really sick. It occurred within the time range appropriate for ARS, so that's a little worrying.