I would like to remind you, Josh, that your theory is pure speculation, as is any notion that Lavos has a gender.
At the present time, there is no proof to suggest that Lavos has a gender, nor is there any proof that Lavos is genderless.
I'm being perfectly serious in this one instance: Just stop trying until sufficient proof is established. What you have at the moment is simply not enough for either party to come to a satisfactory conclusion, without a bunch of "I think, you think" arguments.