Reactisexual is an asexual spectrum identity, someone who is reactisexual does not experience sexual attraction at first, but gains sexual attraction to someone partially or completely after they start thinking about reasons why the experience of sex would be enjoyable with that individual(s), the reasons can be different for everyone.
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Meaning of colors: Blue: Gaining the attraction, Yellow: Opportunity to gain attraction, White: Experience of attraction, Shades of gray: Lack of attraction [1]