Implicating oral_rape → rape
Link to implication

Reason:

It's rape, but with oral sex.

Agreed

forced_oral is a more widely used tag for the same thing.

You don't always know if it's rape, but you can tell if it's forced (someone blowing someone else off struggling to pull away for breath because the person getting blown grabbed the other's head and pulled it down on their cock, is the most common example I can think of).