Is this weird?

My fiancé talks in his sleep but every night he touches me in his sleep too... I always think he's awake but in the morning when I ask him if he remembers what he did he tells me no & starts laughing. I don't mind him touching me while he's sleeping but he does it every night. Like whether it just be grabbing my ass/boobs or dry humping me or anything sexual. I remember one night he started rubbing my body & whispered in my ear 'lets fuck baby' & He was dead asleep... I asked him in the morning if he remembered saying that to me & he said no. Is this weird for him to do? Like should he get checked for it? He's also had seizures in his sleep... 😁