Its a rare thing but its possible. Ive been a part of it in the past.
My friend (lets call him L) was talking to me one night and he was saying that his friend (lets call him H) was going to try to take over my body like a possession and speak to him. Eventually it did happen, i allowed it to and i dont remember a thing that happened after. But there was a full converation between them through me.
(This part will be slightly TMI) Weeks later they met up in person to hang out, and H eventually talked about the event and said how he knows now how painful period cramps are for a girl. He knows because unfortunately when his soul went into my vessel i was on my period lol.