How can a professor hitting on a grad student under his purview not constitute sexual harassment? He has as much — if not more/longer term — power over the student’s career than a private sector boss, where it would clearly be sexual harassment. He can create a hostile work environment just like the private sector,…

Depends on the jurisdiction. US law favors open and unburdened speech, so the government won’t help a plaintiff (via civil suits) shut someone else up or punish them for speaking unless s/he can prove what the speaker said was factually incorrect when said. Other legal systems have favored forcing the speaker to prove…