Somewhat related to topic #17099, I've noticed that the #other(s) (1other, 2others, etc) tags are frequently being used for non-humanoids, particularly animals (post #3991299) or even mecha (post #3869772). The other tags were meant as a counterpart to the #girl(s) and #boy(s) tags, so I think other tags should be restricted to humanoid beings we would typically associate with human sexes and for non-humanoids it would be better creating a new set of tags for them instead of lumping them together with unidentifiable sex or neither sex humanoids.