Maybe because they can choose from such a wide range of products that can not decide to choose one thing out of many. Situation like that is easy to observe, for example in the case of jewellery. For example, in the internet we can find so many online shops with jewellery and handmade jewellery that we can spend all day choosing the best necklace or bracelet.
One of the greatest shop could be found there- jewellery stores.
On many websites we also can find beautiful jewellery for men.