The pineapple juice is considered to be a very healthy as well as beneficial substance for the human body. It provides a lot of the benefits and healthy substances to the human beings. So, what does pineapple juice do sexually ? Here is the answer! It ultimately increases the stamina as well as energy in order to perform multiple things on a daily basis. Pineapple contains the vitamin C in it along with the thiamine in it, which is very beneficial as well as important.