When you tan on a tanning bed WHY you don't notice your new tone on your skin but other people do?

any good explanations

When you tan on a tanning bed WHY you don't notice your new tone on your skin but other people do?
because you're used to seeing yourself. it's a gradual process and we see ourselves differently. you won't go into a tanning bed and be five shades darker, and it's usually when we haven't seen ourselves in a while that we notice the changes. other people aren't there to see the graduation from one level to another, so the immediate effect is stronger on them. if you were to tan three times a week, and not look in the mirror until the very last day of the week, i'm sure that you'd notice a difference.