<human>: I've been going out with this girl for about a month now. I'm going to get into a bit of slightly gross detail, but it's sort of necessary. We've been intimate for about half that time. The first time I fingered her, afterwards I saw that she had some shit on her ass. I was really freaked out, but I pretended not to see it. She went to the bathroom shortly afterward, and when she came back, it was gone. She orgasmed pretty hard when I was fingering her, so I assumed that she had shit herself and was probably really embarrassed about it. I figured it was a one time thing, and that I wouldn't ever have to deal with it again. The next few times we became intimate, there were no signs of any nastiness.

However, I spent the night at her house last night, and started fingering her again. That was when I discovered that her asshole was already covered in shit. So the whole time I'm WTFing in my head, and I just finish her as fast as I can, washing my hands immediately afterward, and we go to sleep. She goes to the bathroom afterwards to clean herself up.

Then she wakes me up in the middle of the night because she can't sleep. I grudgingly start playing with her again. It looks better. She clearly tried to wipe it off when she went to the bathroom earlier, but she didn't get anywhere near all of it. I don't understand how you can not notice that you aren't wiping your ass enough, but this is the second time that it's happened. How the hell do I tell her she needs to clean herself more? I want to do it as fast as possible because I know she likes oral, and I really *don't* want to get caught up in that when she's neglected to clean herself.

*Help me, Reddit!

Provide a brief overview of the text.
<bot>: I'm 16 and male. My girlfriend (17) does not clean her ass well enough. How do I tell her without offending her?