Margaret Trudeau, suffering from bi-polar, definitely was romantically linked to the Rolling Stones .
Castro was immensely popular with the hollywood/entertainment corporate establishment.
If she would engage in certain activities with the Stones, to the point a song was written about it ( respectable ).
It's not hard to believe she did the same with Castro.
Snopes tells us its not true, which leads me to believe it is.
Justin also praised Castro, if you recall all the fun conservatives had with his moronic statement