Similar to a virginity card, but pertains to
one's sexuality instead. You lose your sexuality card after you realize you are
gay or straight by developing a crush on someone or after kissing someone.
For example, you can think your'e straight, but have a crush on another
guy and realize you're
gay. That
guy then took your sexuality card. Same thing can happened after kissing, you can think youre sexuality is one thing, and kiss someone, and then realize its something else, or confirm that it is what you thought it was. You would therefore lose your sexuality card to the person you kissed. As long as your sexuality is confirmed by said
crush or kiss.