I guess your belief that Title VII under the Civil Rights Act of 1964 is unconstitutional, and that’s why you think sexual harassment isn’t a federal crime.
But the fact remains the federal government will prosecute your butt and get a guilty verdict for sexual harassment if your only defense is, “it’s not a federal crime”.
And if you still doubt what I’m saying read this from the Justice Department’s website:
Sexual Harassment Policy
The Department of Justice’s policy is to maintain a working environment which is free from any form of harassment related to a person’s sex, race, color, religion, national origin, sexual orientation*, mental or physical disability. This policy prohibits sexual harassment of employees because it, like other forms of harassment, interferes with a productive working environment, interjects irrelevant considerations into personnel decisions, and generally demeans the victims of harassment. Moreover, sexual harassment is a violation of Title VII of the 1964 Civil Rights Act.
*DOJ Sexual Orientation Complaint Procedures
http://www.justice.gov/jmd/eeos/sexualharassmenthome.htm
Can you cite the criminal statute?