The bulk update request #11361 is active.

create alias sniffing_butt (0) -> butt_sniffing (4186)
create alias sniffing_ass (0) -> butt_sniffing (4186)
create alias sniffing_foot (0) -> foot_sniffing (1389)
create alias sniffing_shoe (0) -> shoe_sniffing (307)
create alias sniffing_shoes (0) -> shoe_sniffing (307)
create alias sniffing_sock (9) -> sock_sniffing (234)
create alias sniffing_socks (3) -> sock_sniffing (234)

Reason: All of these have a history of tagging:
https://e621.net/post_versions?commit=Search&search%5Btags_added%5D=sniffing_butt
https://e621.net/post_versions?commit=Search&search%5Btags_added%5D=sniffing_ass
https://e621.net/post_versions?commit=Search&search%5Btags_added%5D=sniffing_foot
https://e621.net/post_versions?commit=Search&search%5Btags_added%5D=sniffing_shoe
https://e621.net/post_versions?commit=Search&search%5Btags_added%5D=sniffing_shoes
https://e621.net/post_versions?commit=Search&search%5Btags_added%5D=sniffing_sock
https://e621.net/post_versions?commit=Search&search%5Btags_added%5D=sniffing_socks

The sniffing_x alias syntax was present on some tags already, but this alias BUR extends it to all sniffing tags mentioned on the wiki.

EDIT: The bulk update request #11361 (forum #454092) has been approved by @spe.

The bulk update request #11361 (forum #454092) has been approved by @spe.