The bulk update request #4963 is pending approval.

create alias penis_in_own_mouth (464) -> autofellatio (9729)
create implication penis_in_own_ass (136) -> penis_in_ass (102234)
create implication penis_in_own_ass (136) -> autopenetration (3000)
create implication penis_in_navel (251) -> navel_penetration (1206)
create implication penis_in_navel (251) -> penile_penetration (356847)
create implication penis_in_tentacle (1165) -> penile_penetration (356847)

Reason: I wasn't able to find any existing BURs for these, so:

: Should be self-explanatory.
penis_in_own_ass -> ...: Same as how penis_in_own_pussy is handled.
penis_in_navel -> ...: I can't see a situation where this wouldn't be considered penetration, and tentacle_in_navel implies navel_penetration too.
penis_in_tentacle -> penile_penetration: penis_in_tentacle implies tentacle_sex already, so it's just missing this other part.

_{(First attempt at a BUR, lemme know if I did something incorrectly)}

Not sure penis_in_own_mouth is necessarily autofellatio, though I can't find any current counterexamples.

True, there could be an instance where it's just inside the mouth rather than actually being stimulated in any way, but every post it's currently used on at least seems to fall under autofellatio.