I want to create additional tags for specific kinds/sources of tan lines. Namely one for One-Piece Swimwear, one for Two-Piece Swimwear, and 1-2 tags for unusual/uncommon tan lines including the shockingly uncommon "farmer's tan" and strange cases like tan lines from bondage, collars, shadows (or arms, etc), writting in sunblock, tape, etc.
Any thoughts/suggestions/objections?

I skimmed through and collected a few strange tan lines in a set https://e621.net/posts?tags=set%3Aunusual_tan_lines

The vast majority of the tan_line tag is lines from swimsuits on female characters, but there are a few on male characters that might mess with the one/two-piece dichotomy. Two other things of note are: sometimes characters have one-piece tan lines while wearing a bikini which is perhaps notable/interesting enough to warrant its own tag? Hypothetically a character could have a tan line implying that they were only wearing one half of a two-piece, so tanning in a topless/bottomless bikini (I don't recall any, but it is possible)