Will you agree if your government wants to apply a regulation about porns and sexuality?:
The federal government has no delegated power to make laws concerning clothing except in those geographical areas under direct federal control.  States and localities have power to make such laws within their jurisdictions.  By and large such laws reflect local perceptions of decency and civility.

During the last 30 or so years the existence of such laws and the application of such laws have significantly loosened.  For example, most people no longer formally dress to go to church or to dine out.  Society has come to respect (some refer to it as political correctness) those who wish to dress differently.  For those who do dress differently they should be realistic in their degree of difference by not anticipating a warm acceptance of some style and this is particularly true when dress reflects sexual mores.