Preferring to have sex tied in with emotion is one thing and is understandable, but saying that phonesex with strangers is unhealthy is altogether another thing, so I hope BrokenAngelWings (a great userid) will answer that part of the question.

In general, though, not having phone sex with perfect strangers will do absolutely nothing towards moving towards the ideal of having sex tied in with emotion. In order to have sex tied in with emotions, you need to develop meaningful relationships, and having or not having phone sex with strangers in no way impacts that.

Are you having meaningful relationships then?