The bulk update request #11459 is pending approval.
create alias little_penis (0) -> small_penis (25774)
create alias little_cock (0) -> small_penis (25774)
create alias thick_dick (3) -> thick_penis (44177)
create alias thick_shaft (22) -> thick_penis (44177)
create alias small_testicles (0) -> small_balls (5119)
create alias big_testicles (1) -> big_balls (263001)
create alias large_knot (19) -> big_knot (4287)
create alias large_sheath (31) -> big_sheath (2830)
Reason: A straightforward alias BUR covering synonyms of genital size tags.
Also includes thick_shaft despite shaft not being used elsewhere since it keeps getting tagged to describe thick penises:
https://e621.net/post_versions?commit=Search&search%5Btags_added%5D=thick_shaft