What should I wear to go horseback riding to help keep everything together and from causing damage? I've ridden twice now with UnderArmour on and it keeps it in place but it slides down far too easily which causes pinching and pressure on my testicles and shaft, which lead to involuntary erections when I need them the least! So I just need an opinion as what to do exactly. I love horseback riding now. I just need to fix this and i'll be golden.