Ignoring it may be seen as assent or encouragement. All harassers are men. Women never harass. No, women are just as capable of harassment, but because of stereotypes, men are sometimes less likely to report the inappropriate behavior. Sexual comments are harmless, and those who object often simply have no sense of humor or do not know flattery when they receive it.
Some sexual comments are humiliating and degrading.
Harassment can undermine academic or work performance and can threaten economic livelihood. No one should have to endure such humiliation. Sexual harassment affects only a few people. Nothing can be done about sexual harassment, especially if the harasser holds a powerful position. There is a range of solutions.