I feel like there should be a specific tag for just one arm/shoulder bare, as opposed to both of them
Some examples:
post #944265
post #946165
post #2195103
post #1618207
post #1043078
post #1315788
post #1506351
post #2589771
post #2558870
post #2712234
and it just so happens that bare shoulder is aliased to bare shoulders
single sleeve might do it for 2, 3, 4, 6, 7 and 8, but maybe not for 1, 5, 9 and 10, since the "other sleeve" is (implied) there, just not being worn.