BUR #61433 has been approved by @evazion.
create implication mutual_skirt_lift -> skirt_lift
create implication mutual_foot_licking -> licking_foot
create implication mutual_impregnation -> impregnation
Most are already tagged manually, the remaining do look like the implications apply.
https://danbooru.donmai.us/posts?tags=mutual_skirt_lift+-skirt_lift
https://danbooru.donmai.us/posts?tags=mutual_foot_licking+-licking_foot
https://danbooru.donmai.us/posts?tags=mutual_impregnation+-impregnation