One of the best articles I’ve seen on the history of the song
https://qz.com/quartzy/1486507/baby-its-cold-outside-isnt-about-rape/
Very interesting. I think the song is a classic. It's a light-hearted and very clever exploration of the differences between men and women when it comes to sex. It's a shame that it has come to be regarded as an anthem for date rape. It's just one more example of how much we seem to have lost our sense of humor in a day when everything has to be politically-charged.
I will say that while "Baby It's Cold Outside" is not about rape "#Baby You're Cold Inside" is most definitely about date rape, and (like the original song) the differences between the sexes when it comes to perceptions of sex. In the old days, casual sex made men feel powerful and women feel defeated. It still does, but women can be massively empowered afterwards by declaring themselves victims, and that changes the whole ballgame.
That is not to trivialize date rape. There is no question that it happens, frequently. In spite of that, I think I'd rather be a young female today than a young male. The cards are stacked against the males, imho. That's why so many of them are doing without real life sex altogether and going to online porn and virtual reality.