That's ridiculous. Pure propaganda. Agreed that Osama was a douchebag, but the way these guys write books, show how much they wanna project him as being insane, paranoid and perverted, simply to justify their "War on Terror" and maybe sell their books lol.
Even if this lady Jean Sasson, interviewed his wife, and say Bin Laden's wife jokingly had said - We went into the room and didn't come out, doesnt mean its true. For all you know Jean might be spicing up her book to sell it better. Normally a guy that wages war all the time comes home, he might wanna get it on with his wife and maybe more than once. Cant say that is abnormal.
Now Viagra by itself does not produce an erection and keep it going for days on end. It is just a medication that aids in the dilation of blood vessels, you know the works. Normally taken by people with erectile dysfunction, and should not be taken by every tom *CENSORED* and harry, otherwise they might end up dizzy with low blood pressure and even die. Thats why its on prescription, I guess. Wouldn't take that article too seriously.
By the way, I think he has 6 wives, or rather 5 and about 20-26 children. Ill pick the middle number 23