The current tag "interracial" seems to include:
- dark-skinned male on light-skinned female sex (most results);
- light-skinned male on dark-skinned female sex.
I suggest to create the "dark-skinned_male" tag, so that a user may find only instances of DSM-on-LSF sex.
Likewise, a user could search for "interracial -dark-skinned_male", to find only instances of LSM-on-DSF sex.