The tag alias #71964 collaborative_autofellatio -> assisted_autofellatio is pending approval.

Reason: The tags are used to mean the same thing.
Assisted is the more popular tag.

Also I feel 'assisted' makes more sense as you can only really assist in autofellatio, not collaborate unless you share the same body imo.

Assisted does seem to be used to mean "helping someone suck their own dick" eg pushing their head down or holding them in position.

There is a huge cross-over between the tags though