1.The impotent guy[married or unmarried] hoping it will cure him of Sexual inadequacy.
2.The sexually disappointed and frustrated husband whose wife is prudish and sexually unresponsive.
3.The escapist who uses porn to get his mind off the pressure he is suffering.
4.The curious guy who is eager to learn new tricks,new methods of sexual experimentation.
5.Scoptophiliacs[men who achieve greater sexual gratification looking at others perfoming sex acts] who overcompensate for their own seuxal inadequacy