How can a guy become more comfortable shirtless around girls?

Anonymous
How can a guy become more comfortable shirtless around girls? I'm a guy and this summer I will be doing more outdoor activities like tennis, frisbee, running, etc with some friends that includes girls. I want to get a tan this year but am shy about being shirtless in front of girls. How can I become more comfortable without a shirt while hanging out with them? Should I ask if they are ok with me taking it off? Would it be better to wear it for a while and take it off after a little bit or just start out without it? Any help and encouragement is appreciated!
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How can a guy become more comfortable shirtless around girls? I'm a guy and this summer I will be doing more outdoor activities like tennis, frisbee, running, etc with some friends that includes girls. I want to get a tan this year but am shy about being shirtless in front of girls. How can I become more comfortable without a shirt while hanging out with them? Should I ask if they are ok with me taking it off? Would it be better to wear it for a while and take it off after a little bit or just..
How can a guy become more comfortable shirtless around girls?
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