A tragedy is a representation of an action that is whole and complete and of a certain magnitude. A whole is what has a beginning and middle and end.
AristotleYoung men have strong passions and tend to gratify them indiscriminately. Of the bodily desires, it is the sexual by which they are most swayed and in which they show absence of control...They are changeable and fickle in their desires which are violent while they last, but quickly over: their impulses are keen but not deep rooted.
Aristotle