FDR, Kennedy, Johnson, Clinton....hmmmmm....2/3's of the last few dim presidents have been sex maniacs.....but as far as I know, at least they didn't drown any.
Happened to quite a few conservatives too. Life is messy and people(conservative and liberal) are fallen and tainted.
I don't know how this is news. Most at least suspected that JFK(and many other powerful men and public figures during that time) were philanders and womanizers. A huge gate of sexual openess was swung wide open during that time, along with decreasing modesty in dress, it's not surprising that people took advantage of that opportunity before they could fully see the consequences of it all.