Guys, Do guys tell each other everything?

I was telling my boyfriend how I tell my best friend everything. And that girls talk about everything. I asked him if guys do that and he said no. Not even with the ones they are close to. All they talk about is sports girls and other random shit. I was wondering do guys tell thier friends what he did with thier gf? Like if he had sex with me for the first time would he tell them about it?
Guys, Do guys tell each other everything?
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