TheGreatWolfgang said:
But is there one for ^MALE↪MALE↪_MALE?
Or ^FEMALE↪FEMALE↪_FEMALE if you have strapons?
Or ^INTERSEX↪INTERSEX↪_INTERSEX?

Yep, train_position. Combined with other tags, such as train_position -female -intersex for the first search.

...and it looks like train_position might need clean up. Some of those should be under sandwich_position instead.