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a groomer is someone who manipulates a minor or vulnerable person to gain their trust and ultimately abuse or exploit them. A pedrophile is a pedrophile come on, what are you asking? Like if someone is a pedrophile if they're 30 and dating a 17 year old? technically, but no one really cares about that. 

Neutral for example was a groomer, you may be a minor anymore but you are a vulnerable person and he never had any good intentions with you.