Correspondingly, why do women's jeans have small pockets?
Women's clothes are about flattering the woman's body way more than actually being practical. This is why women's clothes lack pockets. It has nothing to do with making women use purses or handbags but is to do with showing a woman's curves and shape. Women complain that women's clothing lack functional pockets.
Beside above, do skirts have pockets? Even pants and jackets for women often don't have pockets you can actually put things in. While women who worked would wear these pockets on the outside of their clothing for ease of access, others wore the pockets under their skirts.
In respect to this, did Medieval clothing have pockets?
While class unquestionably plays a part, men's clothing tends to have capacious, visible pockets; women's clothing tends to have small pockets, if any at all. In the Medieval era, both men and women tied their bags to the waist or wore them suspended from belts; these bags looked very much like Renfaire fanny packs.
Why do they sew pockets shut on pants?
If you've ever bought a new suit or dress slacks, you've noticed some pockets are sewn shut. The reason for this is purely aesthetic. Sewing pockets shut keeps suits looking fresh. You can remove the stitching yourself after buying it or keep it sewn shut to retain the crisp look.