Java
One cup of Coffee in the morning can give you a
Java-jolt that studies have shown will make you twice as likely to describe yourself as sexually active. Coffee can make you feel like you have more energy and therefore "hornier", but keep in mind that coffee is also a diuretic ( Makes you pee more, lose body water) which can cause you not to get as hard as you like due to lack of blood flow to the penis.
My suggestion: Drink one cup of coffee. and LOTS of water if you happen to drink more...That means you'll pee more.
As a side-not to all that peeing: If you have to pee it will press against your prostate and could make you ejaculate faster.
