Because EMP_Dragon PMed me to ask how to use pillows as the best sex toy.
I'll now share the knowledge with you all *lol*
The obvious use is to cushion the head and/or prop it up while one or both partners are lying down in some sexual position. A very common use of a pillow in sex is to place it under the woman's buttocks or hips before assuming the missionary position; this pivots the pelvis and increases depth of pentration. The woman can also lie face down and have some pillows under her stomach and hips to elevate them for a relaxed doggy style, or she may simply put them under her chest to hold her upper boddy weight while her legs elevate the rear and thus, leave her arms free to reach behind and around or under. Some couples also use a pillow for one partner to rub their genitals against while performing oral sex on the other, thus providing a measure of stimulation for either the woman or man. They're also great to cuddle, bite and scream or shout into during intense and noisy intercourse allowing a participant to "let go" to a greater extent without feeling self concious at the noise levels. Beyond that a partner can rub a soft pillow against their partners buttocks, back or other parts for further stimulation and play during intercourse, but light-hearted pillow fights are also great.
Sure there's other things we consider sex toys far more than a pillow, but pillows are simply taken for granted because they are always present on a bed and are not primarily designed for the purpose of enhancing sexual intercourse. However I'm certain that making love on a bed with no pillows every time would quickly lead to the realisation of their importance to any couple.