Every scientific experiment requires controls in place to empiricalise the data.
Course of action:
Guinea Pig (X) [that's me] does not have a cold - Guinea Pig (X) is to have lots and lots of sex over a long period of time to help determine if there is a relationship between having lots and lots of sex and preventing the onset of having a cold.
As this alone would not determine that the prevention was solely related to the grotesque quantities of sex that Guinea Pig (X) [that's still me] battled his way through, Guinea Pig (Y) [that's JH] will act as a control. Guinea Pig (Y) will have no sex over the same period of time to see whether not having sex can increase the risk of getting a cold.
If Guinea Pig (X) [yep, that's me] does get a cold whilst under the frequent sex programme, the experiment will move on to determine whether the cold symptoms can be repressed, or eliminated, by increasing the dosage of the preventative measures. This will be ramped up over a short period of time to the limits of human endurance [helluva hand, that Guinea Pig (X)].
In essence, whilst we may be treating the symptoms, rather than the disease, if we are able to determine a method to reduce the risk, or somehow make the symptoms more bearable, we shall have advanced human health understanding in no small measure. Being essentially altruistic in my outlook on this programme, I can see that positive conclusions could be easily transferable to societies where supply of drug-based treatments is limited or non-existant.