For example, let’s assume your character is F to M and is attracted to females. He would likely be an incredible lover, having a very good understanding of the way the female body (at large, of course everyone is different) reacts. Or if he were attracted to males, he could be giving some advice to a friend. Someone may wonder how he got to know such “inside knowledge”. This would be a good way to introduce the conversation casually, in passing.
If the idea of sexualizing your trans character too much horrifies you (let’s say for example they are trans/asexual, or romance is not big in your story), you could play it from a different angle. For example your character could share some first hand experience about being through surgery, or the effects of hormones, talking to someone who needs to go through these procedures for different reasons. (Some cancer patients take hormonal therapy, for example.)
I hope this helps ^_^ Looking forward to read your story!
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