Are chillies good for getting a better erection

Some people say that eating chillies is good for getting an erection as the chillies make you flush. That is because the blood vessels expand, but to carry that analogy further, instead of eating, rub them on your willy. Direct application is better. Think about it, all the power of chillies ingested through the mouth is spent on doing things to the blood vessels in the mouth and face, and by the time the impact arrives to the groin, it is vastly dissipated. And what happens if all the little chilly does is to flush your willy but leave it limp? not good. Also not sure if you want your willy to be burning and you wanting to dip it into water or yogurt. If you have to do that, might as well as go directly and rub chillies directly into it.