Anal?

So me and my SO have done anal in the past but it's not a really a every time thing. Mostly when we are in our most sexiest mood. But this time a bled a little and just hope it's not a big problem. Because that happens to me when I have you know those big 💩. And he cums in there too, is that harmful at all? I know ejaculation is made of proteins, so I wouldn't think but just curious.