The bulk update request #12555 is pending approval.
create alias muscular_bottom (3374) -> muscular_penetrated (2)
create alias muscle_bottom (50) -> muscular_penetrated (2)
create alias muscular_top (2508) -> muscular_penetrating (0)
Reason: *_penetrat<ed/ing> is preferable over bottom/top to avoid ambiguity with on_bottom and on_top. Most similar tags use the same syntax.