Oh, Pinterest! You try so hard to read your users' minds, but you frequently fail, and those failures are equal parts pathetic and amusing.
I've been pinning some pictures of women with pixie cuts (every so often I toy with the idea of cutting my hair that short, and then gradually talk myself out of it), and one or two of the pictures were of women with grey hair. Pinterest, only looking at tags rather than trends, decided that I must be looking for information about hairstyles for women over 50, and has inundated me with pictures that are completely useless to me.
I've been looking at pictures of medieval, renaissance, and Victorian kitchens because I love the wood and brick and tile, and so Pinterest shows me modernist, minimalist, micro-kitchens with stainless steel and glass and sleek, white surfaces.
I've been looking for examples of historic blackwork and smocking (embroidery and pleatwork) for my SCA garb, and Pinterest keeps showing me avant-garde runway fashion from Japan (where they love applying origami techniques to fabric).
It's rather like going to a library in a foreign country and having a hapless assistant who doesn't speak your language insist on finding all of your reference material for you. After a while, even this non-drinker wants to retreat to the local pub for fortification so as not to strangle someone. Pinterest is useful for keeping all of my inspiration photos and links in one place, but complete rubbish for trying to find new sources. And the best part is that, unless you encounter a previously-undiscovered bug in the system, the only help you can get is from "Pinterest Experts," who are just regular users with no access to the back end or the developers and who can only quote the FAQ at you. It takes "unhelpful" to new lows.
But golly, is it ever addicting.