a form of virtual sex; a sexual intercourse but done remotely and verbally, i.e. two people talk by phone and their deliberate choice of words (as well as intonation, tone of voice) is intended to produce sexual arousal of the party talked to. As a follow-up to its verbal level, phone sex can be connected with masturbation; in its other version, phone sex is synonymous to an act of masturbation being described and commented on over the phone to turn the other party on.
She went on how she liked doing it and he gave her his hot load of words that touched her almost like his hands did when they made love yesterday, and all that made her nipples grow harder and harder. In fact, they spent an hour on the phone indulging in phone sex.