Should I buy my teen son condoms?

Li
My son is 15.5. He's in high school, plays football (on the #1 high school team in the USA), just started dating a girl, and really seems to be coming out of his shell. He's been in private Christian schools and his high school is a private Catholic school. I've been thinking I need to buy him condoms but I don't want to put ideas into his head if they aren't already there. Hell, he's a teenage boy so I can assume the ideas are already in his head. I just don't want it to seem like I'm ENCOURAGING him to have sex. 

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