Hiya, I'm a Coach and Therapist... hope this helps.
Whatever you feed your mind with will grow.
It's like walking on a grassy path... the more you walk on it the deeper/stronger/walked on the path is.
If you truly want to change you must reduce this feed.. but how?
to begin with, realise and accept that there is a benefit to what you are doing.... the obvious rushes etc.
In order to reduce a 'craving' affect, you will need to find out what you can replace this with.... What other things does your body / your mind want and need.
This may not be a 'on.. then off switch'..... This will be a strong desire for you and you may need to 'wean' yourself away.... less and less... replacing with a more appropriate option for you more and more.... This other option will need to give you lots of 'feel good' feelings of dopamine etc in order for you to want that more and more.
o
Ask yourself how you can improve things.... perhaps meeting up with 'the same woman' and less often than before.... this could be your weaning.
There are also 'mind techniques' that work really well..... It's the 'sex' emotional charge that has geared you in this direction. You can practice imagining that first video you saw with a different emotion instead (eg. laugh at it.. or yawn at it, or imagine 'whatever').. practice this and you should be able to reduce that 'seedy sex' emotion that will, in turn, help you right now.... But, importantly stop more feeding of this as much as possible (with porn etc).
It's important that you learn to love yourself again. Because you need to love you before you will be able to bring love into your life.... and learn again about normal relationships.... one step at a time.
Do not judge yourself..... accept this is where you are at now...... and learn to be better.... one step at a time.
Once your body and mind get what you truly want and need then you will find that cravings etc go also...... this is a process, but this will take time and do not suffer if/when you sleep again with a woman who chooses to charge you for sleeping with her.... Just keep moving more toward your goal of finally being able to have a fulfilling happy loving/passionate relationship one day.
If you want to be better you will be.
GOOD LUCK!