Here is something I’m still trying to figure out…we all know that nitric oxide helps blood vessels relax; this is good because this is what happens during an erection (which is how Viagra works). According to this obscure article (LINK HERE), one of the things that can help raise nitric oxide levels is nitrite, which is used to preserve meat (like hot dogs). Another point of the article is that saliva contains a lot of NITRATE, which is converted to NITRITE by bacteria in the mouth…this effect is blocked by mouth washes that kill bacteria…

 
So, what does this mean to me? It could mean two things: eating nitrites (in, say, hot dogs) might increase nitric oxide levels; and saliva may also raise nitric oxide levels. So, while this is not in the article, and it is pure speculation, it seems possible that saliva may support erections. I leave it to your imaginations to figure out how the saliva is applied to the appropriate area – for men AND women.
 
(Does this explain why sex in the morning – despite “morning breath” – is so much fun?)