I noticed that there is a tag called handjob_while_penetrating which is distinct from reach_around. There are a lot of posts that are only tagged with one but not the other.

The differences between the two seem pretty minor. According to the wiki page, reach_around additionally encompasses vaginal fingering and the rusty trombone. So handjob_while_penetrating would be a subset of reach_around and would therefore imply reach_around.

But reach_around might have the additional caveat that it requires one character to literally reach around the other (e.g. would a handjob given in the missionary position count?). I'm not sure if this is the case; the wiki page has the words "reaches around" in quotes, which might indicate that it's giving the etymology of the name rather than an actual requirement. For what it's worth, there are a number of posts which do not meet this criteria.

Any thoughts?

would handjob_while_penetrating not also apply when a characterA is penetrating characterB and also giving a handjob to characterC?
also, reach_around may apply to posts where there is no penetration. furthermore, there is a possibility of a character penetrating another in a non-from_behind_position, in which case handjob_while_penetrating would apply reach_around would not.