Different Positions for Different Penis Sizes

The Butterfly

If you come across a guy that has a penis that is smaller than the average guys, this is a great position for you. You're probably aware that raising up your hips with a pillow enables even more penetration than lying flat. This position, whether executed with him crouching on the floor or with you reclining on a raised surface while he stands, creates the optimum angle. Because your arms and abdominal muscles assist in body support, neither position should be more difficult than the other; it simply depends on how tall your partner is and the surface you choose to do this on.

Doggy Style

This is another great position if you are enjoying a night with a guy that has a smaller penis. There's a reason that doggy style is such a great pose. It can also refer to any variance of the position in which the partners are on their knees and he enters you from behind. When you're supported by your hands or lowered onto your arms, he'll be able to enter you much deeper than one with a larger penis.  The nicest aspect about this position is that this fantastic angle is maintained whether he's bending you over a low piece of furniture or leaning forward over your back for a much more intimate position, and you'll be able to stimulate yourself clitorally.

The V-Sit

This position is great for men who have larger penises. For the same reason that lifting a woman's hips allows for deeper penetration, allowing him to enter from above enables him to regulate the depth of his thrusts. This position, while requiring some flexibility on your side, may be changed by the area you choose to attempt it on. The objective is to keep his hips level or slightly downward pushing. Depending on his size, he may still need to be careful not to thrust too deeply for your pleasure, but ideally, you'll discover a surface that puts him exactly where he needs to be.

The Rocking Horse

Guys with a larger build can be scary, which is why women appreciate the intimacy of this pose. All woman-on-top sex positions give you more control over the depth than others, but it happens to be one of the most comfortable ways to have your spouse underneath for a slower love-making session. This position also allows for your partner to use a hand-held vibrator to further stimulate you.
In conclusion
It's not the size of the penis that matters but the way you use it. Every partner, male or female, is formed differently, and part of the fun of having sex is figuring out how to get the most out of it.