Speedo Inserts
 

Has anyone ever tried inserted some sort of thin foam pad or something in the front of their speedo to help hide outlines? I have a new yellow suit which I'd love to wear but it really shows too much that I would want to show in public. I was thinking maybe I could find something to put there to help hide the details.

Try a swim jockstrap

Those thin foam inserts work great. Many years back our coach ordered the team new yellow nylon speedos. (school color) Needless to say it was a disaster. We may as well have been nude. After the first meet he ordered those inserts. They slipped between the front of the suit and the front panel. Stayed in place and kept the school board from having heart attacks. The horny girls - and maybe some boys - only got a peek at our butts after the first meet. It isn't like padding, it is just a way to smooth out some of the details and, in light color suits, make them public beach friendly.

Best then, to avoid wearing light colours.