I love massaging my girlfriend's feet. But she doesn't allow it anymore. How can I persuade?

My girlfriend is really a very beautiful girl. Maybe more beautiful than I deserve and her feet are also very beautiful. I also love massaging her feet but recently she understood my intentions and does not allow it anymore. Give me some tips, how can I convince her?

I love massaging my girlfriend's feet. But she doesn't allow it anymore. How can I persuade?
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