For 12 years, the presenting tag had a definition which made it clear that it was only meant to be applied when the person presenting was a woman. A couple months ago, without any forum discussion, the definition was changed to include both sexes. Granted, the naming of the tag should be updated to make it clearer (similar to assertive_female), and the male version should also be tagged. But I don't think the two should be combined under a single tag.
The people who wish to see one will often not care for the other and people who wish to avoid one will not necessarily want to avoid the other. Additionally, there is currently no single combination of tags which differentiates presenting_male from presenting_female. male_focus will exclude posts which also feature women, which is also why the sex count tags (1girl, 1boy, etc) won't do it. yaoi and implied_yaoi are not always present, and neither is bara. There's no flawless way to separate the two concepts.
This is kind of a problem. Even as a man who is attracted to other men, there are very few contexts in which I would like to see a dude's gaping butthole unless that's what I'm specifically looking for.
I propose that the tag be split into 2 separate tags: presenting_male and presenting_female.
@Admiral_Pectoral I'm interested in hearing your thoughts on this matter.