There are a number of foods you can eat to increase sperm motility. Zinc is good, as is Vitamin A and Lycopene.
motility of sperm help yes/no
Cranial Nerve X, or the Vagus nerve.
cranial nerve X, or the Vagus nerve
If you are talking about the solubility of gasses in a liquid then lowering the temperature will increase the solubility of the gas