Girls, how to get summer tan?

rangerdanger4x4
I'm a 17 year old guy and need some advice. This summer I will be working outside doing yard work and would really like to take my shirt off because it will be so hot. I'm pretty white and need some sun but I don't know if this would be weird to people. So my question is when is ok to be shirtless, what should I do with the shirt once I take it off, and for how long should I leave it off for a nice tan? I don't really want to use any tanning aids...just the sun.
Girls, how to get summer tan?
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