I don't know if it's weird but I can only sleep with a side sleeper pillow, like this:
Normal pillow doesn't do the job. It needs to be some kind of sausage, because it relieves strain on hip and shoulder joint and most important prevents your inner thighs touching, which is a disgusting feeling.
I honestly don't get how anyone could sleep without it. But it takes a lot of space in bed and your partner will be annoyed from time to time.
PS: I'm no pillowfucker, though!