Some people choose to wear a swimsuit, just as they would at the beach. But, because of the privacy of indoor tanning, most tan in the nude to avoid tan lines. Any skin that has never been exposed to ultraviolet light before will be more sensitive. These parts must acquire a tan slowly. Cut down the exposure time for these areas to 1/3 or less of the total time recommended by your tanning professional. When you can’t see any tan lines on your body at all, it’s ok to expose that skin the same length of time as the rest of your body.