Why is it that no matter how long I am outside or at the beach I never TAN?

No matter how long i am outside i stay white. Like i got way darker than i used to be I look golden now, it is noticeable irl not on photos lol but many people still think that I wasn't on vacation because of how pale my skin is. What is it? Why it happens? Anyone else with this issue? I like my skin colour it's just that it's weird that on summer I don't tan lol

Why is it that no matter how long I am outside or at the beach I never TAN?
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