I bought toilet paper from Staples.com once. It was one of those gazillion roll packs. It was reasonably priced, with free shipping. It arrived the next day and went straight on to the garage shelf for storage. Easy peasy. But I never did it again. Why? Honestly, I’m not sure.
Mostly, I think it’s a learned behavior. Toilet paper and paper towels come out of the grocery budget so I buy them when I go grocery shopping even though they take up too much room in the cart and are annoying to deal with at checkout and in the car.
Shopping for those items online was easier, but it meant making a special trip to the online store in order to complete the purchase.