Two men having sex together, regardless of how they identify, is GAY sex. Not bisexual sex.
Jessica flat out calls James ‘gay’. Not ‘James had some gay sex in my car’, but ‘James is gay’.
James is not gay. James is bisexual. A bisexual is James. Bisexuality is the sexual orientation of James. James’ sexual orientation is bisexual. Bisexual James. James the bisexual. Bisexual is how you describe James who is a bisexual and named James.