When talking about transgender people, most people may have stereotype on them, especially when they didn't know about transgender people before. Some stereotypes are negative for you to understand transgender people. Not all transgender people are abnormal and strange, not all trans women are love cheaters.
Don't talk about sex on the first date
It's rude to talk about sex when you first meet your trans date, no matter she is a trans girl or not. Not all transgender women are comfortable with topics on sex and their bodies. Be gentle and polite when dating a trans woman.