I just used the word s_x instead of gender and I could post discussion!?

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I just used the word se_ instead of gender and I couldn't post discussion because in my profile I had asked not to see content of a mature nature. Did I misunderstand "content of a mature nature"? I don't mind someone using mildly bad words or even talking about S_X in a mature manner. I just didn't want to read a graphic how to or see pictures of it since I have children in the house. How is the word S_X content of a mature nature especially since it can be interchanged with the word gender? Honestly!