Honestly I am really surprised someone with as encyclopedic of a knowledge of Phineas and Ferb as I have took the time to read through this and dispute an error. Kudos to you!
I guess it could be argued that Baljeet is bisexual, though I will admit that that was not what I had initially argued. Additionally, I should add that by no means do I think Doofenshmirtz is actually gay nor do I think he is intended to be. I just noticed a handful of examples which could lead to that conclusion and ran with it.
Hope you enjoyed my writing otherwise!