You can also make a small hole in the casing and thrust into the stuffing inside - this method probably works best with a solid wadding or a foam pillow.
Why Girls Hump Pillows and Stuffed Animals
That is particularly true if you happen to have a pillow fetish and you find pillows not only comfortable but also sexy.
If you are a girl, you can ride a pillow and grind your clit and labia against it.
A strange fetish of masturbating with a pillow. In masturbation, ejaculation into thin air may be disappointing, but cumming against your favorite pillow great.