Sam Esmail talks about the bondage scene between Joanna and Tyrell. He said that there is nothing sexual about Tyrell's sexual engagements in the story. The scene with Tyrell tying up Joanna is supposed to show the power in the relationship. Esmail says that Joanna is in control because she is the one making Tyrell tie her up. She is in command, and he is weak, representing his weakness for failing to accomplish their objective. I don't think you can label Tyrell as bisexual or asexual or pansexual or anything else. I think Tyrell portrays the fluidity of sexuality and the spectrum theory, rather than the absolute titles of being gay or straight. I think he does whatever and whoever he wants for his own reasons, no matter how uncomfortable or annoyed it may make him. Although sometimes I think he is platonically in love with Eliot, especially when he calls Eliot "God" to Joanna.