My wife (and no, she's not overweight, doesn't drink and doesn't smoke), sometimes snores but more often she's just very fidgety in bed. I asked her about it but she said something about not being satisfied, dunno, I wasn't really listening.
Anyway, I often end up sleeping on the couch. problem is, the dog snores really loudly, so I end up sleeping on the couch in the conservatory.
Cure? Virtually all snoring is IME, down to people sleeping on their back so something that stops that happening, tennis ball sewn into your PJ's, knickers or one of them tubes with a bulge at the back. Just wear your cycling fanny back filled with marbles when you're in bed.