To establish some kind of friendship with a webcam girl.
To socialize inside an adult webcam community, and if possible to to watch him in free chat (free cam to cam).
Keep in mind that the vast majority or these sites are divided into categories, so you can find the body type of webcam model (woman or man) you prefer the most.
An other reason to use such webcam sites is online safety and privacy.
Usually webcam girls don't like to be treated like sluts and perform acts they dont wish to do.