sometimes it’s simply just sins of the flesh/letting your selfish desire rule your thought process and not caring that it’s out of control or improper what you’re doing. Along the line of most other addictions. Much more common but some times diagnosed as other disorder(s) and the person treats that disorder and never deals with root cause -their personal choice to feed the sin life. I know of many.
That’s also very true. Sex can be a powerful addiction.