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No, it's not, if anyone has ever used it as an excuse it was to justify an affair to someone they cheated on. Unconscious people don't open their eyes, they can't see, make conversation and physically interact with other people coherently. Sleep walking people navigate spaces they know by muscle memory to seek out simple to use stationary objects they may interact with, like a fridge. You can't be asleep with your eyes wide open asking someone to bang you, but you can be drunk and do all of that. Try Occam's Razor once in a while.
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When he spoke to him he wasn't sleep he was drunk. People can sleep with their eyes open, my friend sleeps with her eyes wide open. Sexsomnia is based off muscle memory and dreams. It works similarly to sleep talking, sleep walking and whatever else. There's Ben cases of people doing random things in their kitchen almost like cooking while sleeping.
It sucks because when he goes he remembers what happened last time he did it but when he wakes up he doesn’t remember so maybe it’s not that made me thinks it’s a plain double personality and like he just doesn’t know right now I don’t know but it’s very confusing it doesn’t make any sense ( ̄へ ̄)(╯°Д °)╯╧╧