The bulk update request #11788 is pending approval.

create alias big_penetration (188) -> large_penetration (16001)
create alias big_insertion (61) -> large_penetration (16001)
create alias deep_insertion (72) -> deep_penetration (7395)

Reason: The word big is synonymous to large and aliased accordingly with other tags, such as big_penis. Also added insertion suffix variants since some are already aliased and the suggested aliases have active tags.