He says he cums fast

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My SO and I were talking last night after sex and he thinks that he comes too fast. After I orgasm he comes immediately after, or it’s almost together all the time. But he said he doesn’t like it and idk why. When we first starting dating he took a very long time, sometimes he didn’t even come. I told him it’s because we are more comfortable with each other sexually, but does anyone else feel like this with their SO !