If you aren't hurting anyone or yourself (some shoes DO hurt....) then have fun! Why would you ask us if it's okay or not? Don't let anyone tell you what is okay or not for you in your life. You might want to keep it discreet around the more uptight people, but that's up to you too.
Many men buy lingerie from our store, HappyHer.com and they find fulfillment and happiness in being able to shop freely and experiment with different clothing. So go for it and don't let other people ruin it for you just because they don't agree with it.