At present, most of the one-piece corsets on the market will have a crotch design, just like baby crotch pants. This design is also for the sake of the wearer's toilet. Therefore, the correct way to open the conjoined corset is this: first put on the conjoined corset, and then put on underwear outside the conjoined corset. When the wearer goes to the toilet, just take off his underwear.