[Granted,] consent can be removed at any point but if neither party states/shows intention to back out it is safe to assume that there was consent during the act even if both parties were drunk because they’d agreed to it beforehand.
And a state of intoxication can prevent someone from being able to express the desire to remove consent. It is entirely possible to start an encounter with that capability, and have an intoxicant ingested before the encounter take away that capability after the encounter has begun.
Let’s complicate the hypothetical further: Both parties are fully sober, and agree to a sexual encounter, in which Party One will pretend to be blacked out. Party One ingests an intoxicant in secret, and actually blacks out after the encounter has begun. Is Party Two guilty of a crime?
In your hypothetical, party one is the guilty one. By lying, they’ve altered the situation and therefore doesn’t actually have party two’s consent (in the same way “stealthing” changes the equation).
And a state of intoxication can prevent someone from being able to express the desire to remove consent. It is entirely possible to start an encounter with that capability, and have an intoxicant ingested before the encounter take away that capability after the encounter has begun.
Let’s complicate the hypothetical further: Both parties are fully sober, and agree to a sexual encounter, in which Party One will pretend to be blacked out. Party One ingests an intoxicant in secret, and actually blacks out after the encounter has begun. Is Party Two guilty of a crime?
In your hypothetical, party one is the guilty one. By lying, they’ve altered the situation and therefore doesn’t actually have party two’s consent (in the same way “stealthing” changes the equation).