My wife's mental illness has made our marriage sexless and with very little affection. I went celibate for around 5 years before venturing into this hobby. I have found "friends" that have helped me deal with this situation and I credit one lady for keeping me sane during the worst part. Yes P4P is what it is, is cheating always cheating or at some point it may become survival. One adult daughter has told me many time "dad you have to find someway to have some happiness, someone to share your life with". She is telling me it would be Ok if I left her mom.
We all have our own reasons, but one fact is constant. A married couple is two people, both are responsible for everything involving their marriage.