The entire concept of vitual sex is disgusting be it with your spouse. If we are staying away from our spouse for an extended period of time, maybe we should go into a state of fasting if one is getting uncontrollable urges.
The point is that while sex is a need of every human, it is also a matter of mutual respect and utmost privacy.
The other thing is that once someone gets into a habit of soing unconventional things, it can lead to other negatives that can become irreversible.