As a Sub, it is always easy to tell what I want during a BDSM session. However, it is sometimes a bit more challenging to identify what I need. Needs and wants take similar meaning in board sense but these terms are different in the sense that 'need' tends to mean essential things while while 'want' usually means something is optional.
A successful BDSM session required the submissive fully understood what he/she would like to experience (i.e. wants) and also what he/she hopes Mistress Leyla will do (needs) during a session. As an example, I always imagine myself as a naughty slave who is a bit dangerous to Mistress Leyla (due to lack of discipline) so that I would like to be restraint, gagged and put in a cell/cage to reflect and control in every session. This is what I want. Similarly, I would like to be tied or chained up, blindfolded and gagged all the time during a session so that I will not have control on anything and Mistress Leyla will determine what to do on my body in the next few hours. This is what I want. I would like to be tortured and tormented by Mistress Leyla, using various tools and methods. This is what I want. I would like Mistress Leyla to control my behaviour and speak all the time so that I could only act and speak with Mistress's permission. This is what I want. Of course, I also want to be trained up by Mistress Leyla to be a better slave and hence I would like Mistress Leyla to assign me some daily tasks to do. Again this is what I want...