You're having sex with the wrong gender.
That's not delayed ejaculation. That's anorgasmia. Are you taking antidepressants? Those of the selective seretonin reuptake inhibitor (SSRI) class are known to cause delayed orgasm or anorgasmia.
Hahahahaha ... forget about gender, what particular species have you tried?
degeneration is just about to realize he's gay ;)