I would never get why Laito out of every Diaboy is most likely considered to take male SO...This boy is purely heterosexual...The way he gags, faints and literally shows visible disgust when he drank a Male’s blood (DIABOLIK LOVERS MORE,BLOOD Tokuten Drama CD “Crowning the Number 1 Vampire! The Vampire-lympics) ; when bathwater of fully handsome male vampires enter his mouth (DIABOLIK LOVERS VANDEAD CARNIVAL Genteiban Drama CD “Thrilling ★ A Tale of the Vampires’ Mixed Bath Experience ~A battle between men~”) ; the disappointment in his voice when he hears he has to participate with other Diaboys who are fully handsome male(DIABOLIK LOVERS VERSUS SONG Bloody Night Tower Records Tokuten Drama CD ”Love and Youth and Dodgeball ~Supernatural Powers Included) ; the reaction when Carla tied his hair(Diabolik Lovers Bloody Songs-SUPER BEST [Short Story])etc.....If there's anybody who's clearly not attracted male/dick having person or who doesn’t have any homosexual interest that's Laito.... Others can be questionable like:Shu?,Yuma? subaru? but not Laito. This boy is straight. Though, He had the potential to be canonically bisexual