I used to be able to, until a good friend of mine committed suicide this summer. For some reason, when 3 of my grandparents died in the same year, I didn’t have much trouble talking about their deaths. Maybe it was because I wasn’t terribly close to them (they all lived far away, and I was fairly young at the time). When my friend died, however, it became much harder. I cannot help but think of him whenever the subject comes up, which was rather upsetting. Maybe this will change with time, though.
In my experience, it’s easier to talk about death when it’s not as close to you (i.e., you haven’t had an experience with death in a long time, or ever), or when the deaths you have experienced have been peaceful or natural. Suicide is neither, which makes it more difficult to discuss.