Once again, men's minds are going where no woman's mind has gone before. In the span of time they had lived together, very few menstrual periods would have occurred per housemate -- no more than three and as few as one or none -- certainly not enough for anyone to get familiar with the other's habits, if, by some strange fluke of social anomaly, one had chosen to be public with hers.
When it occurred to Amanda that the blood she saw might have been Meredith's menstrual blood, the only thing that was going through her mind was that if you see blood in a woman's bathroom, it is very possible -- even probable -- that it is menstrual in origin. It's not that uncommon.
You seem to simply ignore what we are talking about, and you slip into being offensive to Meredith yourself. We are talking about something that Meredith herself complained for. Something that she, herself described as unnerving. We also know that Amanda was well aware that Meredith was very clean and we know that she had pointed out (also with friends and roommates) Amanda’s not being clean.
Amanda Knox knew that Meredith would found such behaviour unacceptable.
And you say not that uncommon: we are talking about a 20 centimetre blood stain, actually a bathmat splotched with ten stains, and blood in the bathroom other three or four places. Maybe for some people that’s common, but Knox knew very well that for Meredith it was not, she knew it did not look common nor acceptable to her because she was told about how annoying this was to Meredith.
You think that Amanda is projecting shame, shifting blame and accusing Meredith of doing something "unnerving," because you find the appearance of menstrual blood shameful, unnerving and something to be blamed for. Some of us are more like, "Meh."
Not just menstrual blood, the toilet cleaning habits and poor toilet hygiene of Knox that were unnerving to Meredith. Not because it’s me finding them unnerving myself, but because Meredith is reported by testimonies of finding them unnerving. And about shame and blame, again it’s not me projecting: the topic of Knox habits and the peculiar relation with the crime scene includes other things, is not limited to menstrual blood: she was also blamed for leaving feces in the toilet, and for leaving around dirty toilet paper. Again it is not me thinking “may be something to be blamed for”: there is no “may be”, Knox
was blamed for this and the topic was reportedly embarrassing in the opinions of Meredith and her friends.
The fact that Knox projects these things on others (leaves the toilet unflushed – despite she dries her hair there – decides to leave it there and highlights the presence of the feces repeatedly, pointing out the responsibility of someone else; then projects the “normality” of leaving patches of menstrual blood on someone else too ) it’s an obvious indication that she wants to put distance between these things an her, share them with others, reduce the degree of her “blame”. She was the one who was accused of leaving feces, and she is the one pointing out that it’s not her, it’s someone else: it’s an obvious defensive behaviour, an attempt to straighten the scale.
ETA: And it is possible for a young, menstruating woman to take a shower without a tampon and to step out onto a bathmat with menstrual fluid running down her leg and forming a footprint. It can take many women several years to get familiar with and gain the kind of control they want over their bodily functions.
Sorry, I’ve never seen a footprint in blood in my life. I’ve never seen a 20 centimetre blood patch in a bathroom. You need to step in a blood pool to produce something like that. I wouldn’t consider that “normal” if I saw that, I’m not saying it’s impossible blood patches like that, I’m saying it’s not normal. But anyway the point is, Knox knew it wouldn’t be considered normal by Meredith. She knew that that would be not normal for Meredith but doesn’t say that, in her e-mail and police account; she does not say Meredith was extremely clean, and does not talk about Paola Grande putting a 5 euros fine whenever Knox would fail to comply with a cleaning shift. Knox describes possible menstrual blood around attributed to Meredith suggesting that could be something normal, something that could be related to Meredith as a normal occurrence. When in fact it could had been attributed to her out of a complaint, as a behaviour that belonged specifically to “her”, attributed to her by some people who manifested some kind of disgust or repulsion for her habits and considered her “not clean”.