Something about manufacturing consent? Lying under false pretenses?
The consent was given to the person the AI invented, not the human.
Prompted by this hellsite post:
My take is yes it is SA. But I thought everyone would be interested in this new ethical question AI is bringing to hellworld.
Oh, remember my friend’s new boyfriend bragging about doing this a year ago and I thought it was just sad. Seems to have worked for him though, got a lot more dates after automating it, which is even sadder. Granted, they are both the kind of people that get a laugh out of having ChatGPT reply in the style of a bratty teen which they read out loud to me, and it was just painful. The next step beyond someone playing a podcast bit on a loudspeaker.
Saying that it is sexual assault is a bit much I think, presumably you meet in real life and give consent at some point before the sex.