I think it should be socialy acceptable and common place for men to wear their nails polished in public, at work and anytime they desire.
The percentage of men that polish thier nails today is not as large as the percentage of women but it is much larger than I think anyone realizes. Unfortunately men feel the need to hide it.
I have been wearing my toenails polished in public for years and have never had so much as one negative or rude comment and in fact have been regularly complimented. I have at times recieved a strange look but I believe they were more in amusement rather than contemt.
If guys would just start wearing polish openly and without embarrasment then before long it would not be a shock for others to see and would become acceptable.