I find that SPD is fast becoming the "new" Autism/OCD. As in the "we are all a little bit..." way.
I think it is best to separate sensory issues/preferences from sensory processing disorder. Sensory processing disorder is debilitating.
It's not not liking your hands to be wet or dirty, it's having a feeling of pain communicated to your brain when you are wet or dirty.
My daughter cannot shower because it is physically painful for her. The last time she had a shower (out of necessity) she was in there less than a minute and she shut down, she's 10 and I had to hold her up and wash her.
She goes barefoot most of the time because socks (sensory ones at that) and shoes cause her to have a pain response. We are in Australia, so our pavements get bloody hot. But that is easier for her than socks and shoes
I can't touch my daughter unless I ask, so she can prepare herself for the way it makes her feel when someone touches her.
She can go days without changing clothing. She sleeps in her day clothes, and then wears them at school the next day. Changing into clothes everyday causes huge meltdowns. There is no way around this yet.
She had a bath at 6pm tonight, so it is clothing changing night. It's 10pm now, she still isn't dressed and is now refusing to dress until she can have her old clothes back. They are wet on the line. I am on here because I am at the end of my tether, and we both need a break. So I am a bit testy too.
She wears black or navy blue leggings and boy's tshirts, because girls have capped sleeves and frilly bits that she cannot tolerate. Other clothing has buttons, zips, embroidery, hoods, transfers, seems, tags that can all be felt by her and give her a pain response. She can feel buttons and zips through 2 layers of clothing. She is my modern day princess and the pea.
Her friend and myself have sensory preferences in that we don't like tags in our clothing, however, with them cut out, I can wear anything, and her friend most clothing! This is NOT the SPD that my daughter experiences.
So please. Let's not fall into the same trap with sensory issues as we do with OCD and autism. Sensory preferences are NOT sensory processing disorder.