This is a personal toppic of interest that I came across recently whilst on-line and it made me scratch my head to come up with a suitable awnser.
But after much thought here's my honourest awnser although it's one I've covered in the past on other forums/web pages.
1.Medical need/disabilities, I am partially incontinent which means that I need to wear diapers/nappies from time to time in order to prevent a potentially embarrassing and rather publically humiliating accident
2.Whats in my head, psycollogically I feel safer in diapers/nappies because they bring back memories of my childhood/youth when times where much simpler and innocent
3. Accessing my Inner childhood, I never really grew up due to life-long learning difficulties in the form of autism/Asperger's syndrome that wasn't diagnosed until I was in my early 20's in 2001, this means My mindset is that of a toddler.
4. Instant gratification, I really like the feeling of getting into and wearing a clean diaper/nappy as it's like pure heaven to me and the fact that once in them I feel young again and that's not a bad thing.
5.Improvement of general health, I sleep better in diapers as I don't have to wake up at any point in the night to go to the toilet and this is great because I feel much more healthy and energetic.
6. Asphetics, I like the look of diapers/nappies and always have done since I was a child all those years ago when I was born.
7. Relaxation, during the time I am in diapers/nappies I feel more relaxed and less stressed out at the world in general.
8. Convinience, I would rather wear a diaper than use an unhygienic public toilet and the fact I can easily change in and out of them once needed/used.
9. I love the sound of it crinkling every time I move it makes me feel more babyish and in the mood for nothing at all other than being loved and cared for like a little child.
10. Diapers are cool, let's face it that's something that is lve known about since I was a infant/child all those years ago and wearing them doesn't make me ashamed or embarressed at all as they are just another form of under-wear/clothing.
11. the Scent I like the smell of a clean scented diaper/nappy and also the scent of baby powder and creams and gells or shampoo as I like smelling like a baby again as it brings back so many pleasant memories.
12.Softness and Comfort, when wearing them I feel so comfortable and it really does make me think of the time when I was a infant/child in the time before I was Potty trained at the age of 6 , see my previous replies for more information.
And hopefully this will awnser the question.