Not sure where you live but the EEOC has rules against this:
http://www.eeoc.gov/federal/harass/ssa.htmlThere may also be state , city and county protections ( if you live in the US )
D

See below:
SEXUAL ORIENTATION
Discrimination based on sexual orientation is directed at persons who are gay, lesbian, bisexual or
transgender, who are perceived to be gay, lesbian, bisexual or
transgender or who associate with persons who are gay, lesbian, bisexual or
transgender. This may take the form of harassment or treatment that is different than that afforded similarly situated employees or applicants.
To address sexual orientation discrimination, employees may contact an equal employment opportunity (EEO) counselor. Employees' right to address sexual orientation discrimination derives from Agency policy, not from Equal Employment Opportunity Commission (EEOC) regulations which govern other types of discrimination complaints processing. If counseling does not lead to a resolution, complainants will be told in writing of their right to file a formal complaint and given the procedure for doing so. Following an EEO investigation, the
Associate Commissioner for Civil Rights and Equal Opportunity makes the final Agency decision on the complaint. Unlike complaints based on other forms of discrimination, sexual orientation complainants do not have appeal rights to EEOC.