Lincoln had two sons, Robert Todd and Tad. He was also quite shy about "courting" Mary Todd, not because he was gay but because his origins were those of a self-taught, self-made man whose antecedents were poor farmers and hers were well-to-do Kentuckians. There is some thought, but very little (if any) actual proof, that Abe contracted gonorrhea either while waiting for his militia unit to be deployed during the tragic Blackhawk War or on a flat boat trip to New Orleans.

Lincoln's "social disease," like his gayness, is the result of modern interpretations. There is very little evidence for either. (I've seen the "evidence" of his gayness. Much is made of his sharing a bed with other men; nothing is said that this was a very common thing at the time and that nothing sexual was implied by it.)