Dom's girlfriend is attempting to get him into horse riding

Dom Meg and Randell 08/05/2018

Dom and his girlfriend have decided to give each other's interests a go - in an attempt to get to know each other more. She's gone trail running with him a couple of times already. Now it's her turn and she wants to take him horseriding!

There's no way Dom will ever try this. Could this be a deal breaker?