I got many questions here !!!:
First are you constipated ? If so increase Fiber in your diet and increase liquids as well 8 plus glasses of water stay on the 8 or more side
Second what thinks you need a laxative?
Third Do you have abdominal pain ?
Fourth is this a fetish?
Five have you consulted a Doctor I am not one so take my advice with a cavet emptour. at your own risk or even a pharmacist ?
Using Laxatives is serious business you can make yourself incontinent bowel wise and trust me you do not want that if you can avoid it !!!!
Please think twice please unless you consult a doctor
I wouldn't use laxatives just to make yourself mess. It is possible to end up abusing laxatives and over time you may end up having to rely on them to be able to poo at all. (meaning you won't be able to poo unless you take them).