This has been quite thoroughly researched by critics such as Xavier Aldana Reyes in ‘Dracula Queered’ researchgate.net/profile/Xavier… 
Or like Lucas Künnecke “Blood, Sex and Vampirism: Queer Desires in Stoker’s Dracula and Le Fanu’s Carmilla” academia.edu/12280616/Blood…
And in “Heterosexual Horror: Dracula, the Closet, and the Marriage-Plot” by Barry McCrea jstor.org/stable/4095970…
And in “The Mediation of the Feminine: Bisexuality, Homoerotic Desire, and Self-Expression in Bram Stoker's Dracula” by Marjorie Howes jstor.org/stable/4075484…
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“A Wilde Desire Took Me": the Homoerotic History of Dracula” by Talia Schaffer muse.jhu.edu/article/11248
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“A Wilde Desire Took Me": the Homoerotic History of Dracula” by Talia Schaffer muse.jhu.edu/article/11248
But why?! I hear you cry! What is gay about a single man living in a gothic castle, dressing in flamboyant clothing, and sucking the necks of the men he entertains?
Not only does the fabled vampiric bite require a hefty amount of sucking, it is also an act of penetration and fluid exchange. It’s not hard to read this as a sexual act and Dracula preys on men and women alike.
In Stoker’s text, Dracula interrupts 3 vampiric women seducing Johnathon Harker by making it clear that ‘This man belongs to me!’ Then the women, with ‘ribald coquetry’, accuse Dracula of having ‘never loved; you never love!’
Dracula defends himself from this charge by emphasising that he ‘too can love’. It seems pretty clear here that he can love Jonathon - the man he has claimed as belonging to him.
Critic Christopher Craft goes further claims that Jonathan enjoys a feminine passivity while awaiting the penetration of the vampiresses, which entails the subversion of the conventional Victorian gender codes. Which makes sense because Dracula would totally be a top.
Some critics like Thomas Byers have argued that Dracula is not the only one who exhibits homosexual desire in the novel. He argues that Van Helsing, Dr.Seward, Quincey Morris and Arthur Holmwood are also bound together by similar feelings, though they cannot act upon them.
Their desire for Lucy is read as a vehicle for latent homosexual desires for each other. In fact, these men literally come together in Lucy by donating their blood to her. journals.openedition.org/trans/391
Not to mention the scene where all four drive a huge phallic stake into Lucy’s body to destroy the threat she poses. The saucy minx. Unsurprisingly, many critics have read the stake as a surrogate penis
But why would Stoker write a bisexual vampire? Stoker began writing Dracula one month after his friend Oscar Wilde was condemned for the crime of sodomy in 1895. Wilde & Stoker knew each other. In fact, Wilde had almost married Florence Balcombe, who later became Stoker’s wife.
Critics like Nina Auerbach have argued that Dracula was strongly influenced by what happened to Oscar Wilde - a ‘degenerate’ who was also accused of corrupting the young and spreading sexual immorality.
Then there is Bram Stoker himself. One of the best biographies to look at Stoker’s sexuality is Something in the Blood by David Skal. Obviously, we will never know for sure but there is considerable evidence that Stoker was bisexual or homosexual.
Many have read his infatuation with Henry Irving and Walt Whitman as being sexual thegothicwanderer.wordpress.com/tag/homosexual…
And as these pictures have shown, same sex love was not exactly unheard of in the 19th century.
And finally, let’s remember that Dracula is a fictional, made-up character, who can magically change himself into wolves and bats, as well as appearing young or old at will. So, he can sodding well fancy boys if he likes.
