Phone sex takes imagination on both parties' part; virtual sex is difficult if the operator does not put the images in the head of the caller and the caller must be open to the pleasure as well.
The sexually explicit conversation takes place between two or more persons via telephone, especially when at least one of the participants masturbates or engages in sexual fantasy.
In the chat Chatroulette you will be able to see and hear the interlocutor in real-time.
With the webcam it's much more convenient to make new friends!
Easiness and convenience are the main reasons why, in spite of the big number of competitors, Chatroulette continuous being so popular.