This seems like a pretty dangerous alias honestly. I just discovered it after trying to find tags for post #3152725 - there's nothing about the expression that suggests it's about sex and anyone typing fast enough might miss the autocomplete and accidentally end up tagging sex on completely unrelated posts, especially since we already have tags like on box, on back etc. that are similarly named.
EDIT: The bulk update request #1710 (forum #147690) has been approved by @Hillside_Moose.
Updated by DanbooruBot