Sexual harassment vs. sexual favoritism
During f/y 2019, the United States Equal Employment Opportunity Commission ("EEOC") received 7,514 new charges of sexual harassment in the workplace. This represented 16.8% of the EEOC's total caseload.
Sexual favoritism is different from sexual harassment.
Please watch the following short video discussing sexual harassment as compared to sexual favoritism in the workplace:
The EEOC has published guideline on sexual favoritism.

The complete document is available here:
https://www.eeoc.gov/policy/docs/sexualfavor.html
Source:
https://www.eeoc.gov/eeoc/statistics/index.cfm