As a top for all buttplay, I definitely appreciate when a bottom hasn't cleaned out. Way back when I was a little boy, fucking another guy in the ass meant getting your dick dirty. I would wipe it off with tissue, but you would likely smell it until you got home later in the day. In some ways it lead to nervousness over people suspecting something, or the smell itself would get my dick hard again - remembering the episode, and sometimes I was slightly less amusing. Typically, when I took my underwear off, there would be the characteristic brown streak in the front - again a bit tell-tale, but also like putting a notch in a belt - a symbol of conquest. It was 25 years from that time, when I became single after a long-term relationship, that I noticed that my dick was clean when I pulled out and found myself disappointed. Since then, there have been those that have asked whether to clean or not and even when I answer no, 9 out of 10 of them do anyway (why did they ask?). The ones that don't ask always do. I haven't struck brown gravy outside of pre-arranged scat play. I'll have to say, every time I fuck, I feel disappointed when I don't feel anything up there, and expecially when I think I do, but pull out and my dick is clean. Not cleaning out was natural and the way I learned what sex was like - anything else - I might as well use a flesh-jack.