Friends keep saying I'm bi, not 100% straight.

So to clarify I consider myself a straight male. I am into cisgender women as well as transgender women (post or pre-op doesn't matter), those that call themselves femboys if they look feminine enough, even CD's if they also are passable (please note this is not to offend anyone). I am not into men, a man that looks like man plain and simple. Boy, man however you want to say it, does nothing for me.

I have dated transgender women and femboys, some for extended periods. I don't see any as simply a fetish and if I were to find any I felt I could spend my life with I would no problem.

So I am open to my friends about this. When I tell them I am straight they laugh at me and say, nah not 100%. I get it from both my straight and gay friends.

Usually I tell them in my opinion a person is what they believe they are. If a male told me they are straight, but liked to have sex with men occasionally, I'd say I respect what they believe they are. Who am I to question what someone feels their preference is?

I know this is a strange post. I have never done anything like this before. None of this is meant to offend any person or party, so forgive me if I worded anything wrong.

I just would like any opinions on this if you please.