What do you think ,would this work? I can't search "(~artist1 ~artist2) && (~inflation ~fattening)" and it's still a feature I wanna see, but for now I figured the best way to make this less of a problem is by turning expansion into an umbrella tag for any other tag that changes (grows outward) the body of a character. Inflation and fatening are the most important tags, but I don't mind if pregnancy and oviposition are included, they can be removed from searches.

The problem is if expansion has a different meaning from the tags I want to imply to it, inflation and expansion are often used interchangeably, but I dunno to which extent.