Frankly, the OP's question is one which never came up in my journey. We only needed lubrication for anal. Somehow, my partners and I were never lacking natural lubrication for cocksucking. And, we were always eager to mix our offerings by a kiss after having made our deposits. Those were the blissful days when we were not so concerned about body fluids. Frankly, I am inclined to think that when the "ordinary" methods by which two loving persons become fully aroused are not present there may be a need to resort to artificial lube. Some things just have not improved with the passing of time.