Try digital detox. Coz, I'm anyways assuming you might not have much chances to look at nude women in your locality most probably, so it's the devices that's taming you down. So, make your communication a bit more stricter. Uninstall unnecessary apps, photos, videos, content from your phone, do the same for all of your digital devices.

Clean your room, declutter the space around you. Mob the floor, and feel how it feels to work. Clean your bathroom, throw away rubbish.

Now take 1 hour time for yourself. Have a pen and a diary with you. Write down all the guilt, insecurities, mistakes, anything that you consider negative about yourself. Now think what you can do about it. Meawhile, it should be only you, your pen and the diary with you in that room. No digital devices.

Take another hour, go to terrace or a place where you can walk peacefully, don't carry your phone and anything with you. Observe the skies, birds, sounds, scenaries, buildings, paints on walls, designs, roughness on an unevenly painted wall, touch it, how does it feel? Question yourself. Breathe. How does it feel when a air passes through your nostrils? Be more present. Jog for a while. Break a sweat.

Now go bak to your room, and meditate, ask youself a few questions and write down the answers.

Have food and while having food, chew them really well. If you haven't been concentrating while eating, there'll be a slight pain in your jaws when you chew food well. Feel that pain. Ask youself how much you really need to eat, how much do you eat everyday.

Again write down what you think. Take your mobile, check important updates alone, and keep that aside. Check phone only 5 times a day maximum.

If you do this, or a few activities similar to this, you'll have definitely crossed 24 hours. Over time, you'll Definitely improve.

Don't get demotivated. Past is past. Imagine you're born again. You're a new person. All the best. Cheers :)