An ex keeps a communication going for yrs with a female he once had sex with in the past. Man who lives out of town visits his home town and call the lady he have sexual conversations with only to tease her by saying he would like to see her but don't really hook up.
The man is either scared of what might happen, he's nervous or he simply likes phone sex. Maybe he's playing the field, you could ask him this question, some guys will answer direct questions, men aren't all closed books.