How do I buy directly from MetaMask?

As a crypto enthusiast, I'm curious about how one can directly purchase cryptocurrencies through MetaMask. Could you elaborate on the process? I understand MetaMask is primarily a wallet solution, but I've heard rumors about its capabilities for direct purchases. Could you guide me through the steps required to buy tokens or coins directly from within the MetaMask interface? Are there any specific exchanges or partners MetaMask works with to facilitate these transactions? Any insights you could provide would be greatly appreciated.