I have read all your comments. And I agree with what most of you are saying: buy and wear a sports bra while sporting and running ! And today, I got the nerves and asked my wife. I had found a really nice firm pink sports bra in a web shop online, not too expensive. And guess what: my wife said to me, if that is what you like to wear and would love to be seen in, just order it, go ahead. She didnt mind. So I ordered it immediately. I cant wait to have it send and try it on. And then wear it while running. It is coral pink. I think if i wear it unther a tight white shirt it will show a bit, and i cant wait to see what happens if i start sweating. Thanks for all your advice. As soon as I have it I will make some pictures before and after my workout.