I have a co-worker that I regularly talk to about stuff that he has some interest in, like games. Quite often, he'll be uninterested in a certain game, until I

I have a co-worker that I regularly talk to about stuff that he has some interest in, like games. Quite often, he'll be uninterested in a certain game, until I start talking about it. Afterwards, he's very interested in it. He has repeatedly remarked on this situation and how it affects him. That leaves me with a moral dilemma: Am I influencing him too much? My goal has never been to get him to buy something. I've only ever talked about my interest in it and why I want it. But I feel bad whenever he ends up spending money based on my interests when he already has his own.