I have to agree with most of the posters here even though I'm not a woman.
Men should avoid wearing flip-flops.
If it should be worn men should stick with the colors like black, brown, gray etc.
I've seen some wearing neon green, red, orange etc and are so tacky.
I don't like wearing them since I'm not comfortable with the rubber thong especially the sound they make when you make a step.
My feet also do not feel secure when I wear them outside the house.