I like cakes made with butter. I hate cakes made with oil. I have eaten 100 cakes made from butter and liked most of them. I have eaten 30 cakes made with oil and have hated all of them.
You bake me a cake. You use butter instead of oil, but you tell me that you're using oil. I'm not looking forward to this. You're telling me that you're baking me a cake with the ingredient I hate. When the cake is ready, you serve me a slice. I take a bite, and I tell you I think it tastes very good. I eat the entire slice. I even want seconds.
You ask me, "Are you willing to admit now that maybe you do like some cakes made from cooking oil instead of butter?" I tell you, "Yes. I didn't think it was possible, but today I ate a delicious cake and it was made with oil instead of butter."
Except it wasn't. It was made from butter, not from oil.
You tell your friend this story. He tells you that you didn't prove anything. You argue with him. You tell him that you proved that I did like oil cakes but I just wasn't willing to open my mind to this possibility before I met you. He tells you that you are mistaken. "Sakun has never liked oil cakes and we still don't have any proof that he does! It's irrelevant that he thought he was eating an oil cake. The truth of the matter is that he was eating a butter cake -- a butter cake that you made, a butter cake that you served him and lied to him about. If anything, you proved that Sakun does have an open mind. Because he was willing to admit that he had been mistaken when he tasted your delicious cake. He didn't know he had been tricked. He thought he was eating an oil cake. And he was willing to give it a try and to admit that he liked what he tasted. That makes him open-minded, not closed-minded. But you lied to him. You told him that you had made the cake with oil. Sakun believes he's tasted the first oil cake he ever liked, but really he's only tasted just another enjoyable butter cake."
You tell your friend, "Look, it's all the same. Butter, oil, what's the difference? I convinced him he was eating an oil cake, he agreed, and he admitted he liked it. That means he likes oil cakes. He thought he was eating an oil cake and he liked what he ate, so that makes him a fan of at least some oil cakes."
No it doesn't. And if you still think it does, then you're either too stupid, a troll, or both. And any of those three possibilities means this thread isn't worth anyone's time any more.
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All your internet experiment has proven, if it was real in the first place, is that the girls you're talking with are open-minded. That's all you've succeeded in proving. You've proven that they are open to the idea of being bisexual. That is very different from proving that they are actually bisexual.
I am open to the idea of being bisexual, but I am not bisexual. I have yet to meet a man who I have either had a crush on or for whom I'd even want to have a crush on. I don't like penises. I don't want to be anally penetrated. I get sick at the thought of kissing a man. But I'm still open-minded about bisexuality. If I met somebody who I thought was my soul mate and then she revealed to me that she was actually a transvestite -- that she was actually a he -- I don't think it would shatter my world.
But if you and I talked online and you pretended to be a man, but you were actually a woman, and I "fell in love" with you, it would not prove that I'm bi and I have feelings for another man. You're not another man. You're a woman pretending to be a man, and there are just way too many variables there.
To use that cake example once again ... I have "tasted" 100 women and I have liked most of them. I have "tasted" 30 men and I have hated all of them. ("Tasted" just means "encountered." Liking or hating a "tasted" person refers to liking or hating them as a prospective girlfriend/boyfriend.) If I did "taste" a man who I liked, I'd admit it. I'm open-minded. I'm not ashamed of anything sexuality-wise. I am who I am, and that's that. But fuck all if you're going to sit there and convince me that a woman pretending to be a man is the same thing as an actual man, or vice versa (in your case).