Predispose means to have a tendency toward something. Some people believe that just being born in Canada will predispose you to love ice hockey.
Many situations or events can predispose you to have a particular reaction, opinion, or feeling. Being bitten by a dog as a child could predispose you to having a fear of dogs. Having ancestors with great athletic ability might predispose you to enjoy running. If you want to predispose your father to liking your new boyfriend, be sure to tell him about volunteering at the food bank and leave out the bits about his arrest and dropping out of school.