They cite his troubled marriage to Mary Todd and his youthful friendship with Joshua Speed, who shared his bed for four years. David V. Derickson, who shared his bed whenever Mary Todd was away. So if the shoe fits.....
Wow, no fan of Abe, but I never really thought he smoked a pipe!
The sharing the bed thing is hardly evidence. It was common then.
John Adams and Ben Franklin famously shared a bed on their trip from Philadelphia to NY, where they argued about leaving the window open. (Adams was afraid that the draft coming thru the window would make him sick. Franklin explained to him that the germs perfer a closed, warm environment, and that ventilation provided by the opened window would, in fact, help him to not get sick).
Otherwise, Lincoln was probably a pipe-smoker.