No intentions of sending it to anyone and only the shirt off to show gym progress
If it is a picture of urself and ur a boy then it's perfectly fine if the pic is not urself then it's illegal if its urself and ur a girl it should be fine but I'm not sure
If you are just keeping it to yourself then it should be fine, but please do not share it. However, if it is an explicit photograph then it is technically illegal as it will count as CP.