I believe it depends on the finish. Lipsticks with cream formulation tend to produce more pout over mattes or any other. Since cream lipsticks also moisturize the lips, leaving them soft and healthy appearing, nothing extra needs to used.
My absolute favorite beauty invention! Lip glosses double the size of the lips, in my humble opinion, making them appear fuller and of course very bright. The work best not only for naturally full but thin lips as well.
Chap stick/Lip Balm:
A chap stick is all benefits. Not only does it remove chap, create a soft and smooth lip canvas but also makes them appear slightly pouty. With lip balms you have the option to choose between various shades. So those looking for naturally enhanced lips should wear these more often.
Lip Butters and Lip Stains:
Lip butters are only moisturizing whereas stains come in different finishes. But when it comes to the pout factor, I think lip butters do a better job and have longer wear time, whereas lip stains are more pigmented.
It might surprise some of you why'd I add lip liners to this list, but trust me, there were times when ladies would line and then fill in lips with the same pencil and such times still exist. So a lip liner is meant to give definition to the lips and ease lipstick application. But if you wear it all alone, it will not create a luscious pout.
They're similar to lipsticks, only in liquid in form. I love the fact that lip lacquers are not only pigmented but create a beautiful pout as well. Some of them tend to dry the lips afterwards, but if you use chap stick underneath it might hold on for long.