I cheated. I have no desire or need to do it again. I did it because I was messed up and myopic at the time. The cheating and the relationship it brought helped me to see my situation with XH for what it was and leave. Same with my now SO.
Sometimes you need to see how things could be to see how bad they have been and give you the push you need to change them.
So, this silly, pedantic "once a cheater" platitude, does it apply to me? I'm a cheater. Or I was. I'm pretty sure I'm in control of my own actions and I'm positive I won't cheat again, because I can see the reasons why it happened now and I won't ever be in that situation again.
Or does it only apply to men when you "ladies" say that little cliche and throw it at "homewreckers" you're so eager to crucify?