I have been freeballing for more than 5 years now, and now do not own any underwear at all. I do not go to gym, but do go for a run in the neighbourhood park. I love running in the park in my running shorts, those with the split sides that goes all the way up the waist, and no inner lining. It felt so good with my penis swinging left and right as I run, and feeling the breeze on my balls. I got no complain from any other park users. I did not expose myself in any way. I just love the feeling of freedom.