As some one that worked with a lot of executives, high, mid and even low ranking private sector individuals with any sort of management duties. I think you would be very disappointed. The private sector deals with this in a very efficient format and manner. Payouts are huge, HR departments are supper attentive to complaints, zero tolerance policy, most will resign or get fired. Most VIP types also know better, because their life, liberty, reputation and pay depends on it.
There is a very good reason why most private sector has Open Space type office spaces, most meetings have more then 2 people in the room. Open door policies, cameras are everywhere, lots also record meetings (I do), monitoring and auditing of communications, Most meeting rooms have glass walls (literally glass). I would never have a subordinate in my office of the opposite sex with out another person in the room, never ever with a closed door. As a personal anecdote, knew a fund manager at a large investment firm that would refuse to get on an elevator with a woman.
Most male execs I know follow Mike Pence rules, most don't mentor nor meet outside of the office with the opposite sex. If there are meetings they are always in a Public setting. To be honest with you the female managers and execs do the same.
Office Romances are a big no no these days. Lots of contracts have explicitly forbade/discouraged such behavior as well. I had contracts that stated do not engage in fraternization (foreign contracts)
I bet there are incidents but they are dealt with quickly and efficiently and its been like this for quite some time. Have heard stories of guys telling and advising other that this has been going on for like 30+ years. There is also a very high level of Paranoia in the private sector. Not saying this is good or bad but it is what it is. HR departments exist to protect the company not the workers.