In the midst of all the risks and travel Ellie has had to endure, Ellie knows that every day is going to be the last. Ellie doesn't wish to be wasting her time…without having fun! It is obvious what Ellie is seeking, despite the fact that it is a parody comic of the hentai.
Even after apocalypse will happen it will be quite important to be human only possible no matter what type of situation you are and will get into. It is clear that Joel and Ellie are follwoing this simple rule, and no whatever Ellie would like to feel the thrill of experiencing sexually intense sex, she and Joel are going to wait until she is at the legal age first!