I feel the same way.
With an MP, you just have to make an appointment and show up on time (or just show up and ask for a presentation).
However, seeing an outcall SP is a lot more complicated. You have to first acquire another cell phone to be used exclusively for contacting SPs, find an SP whose schedule matches yours, make the appointment with the SP or agency, find a hotel that does not require ID, and which is within the area the SP will travel to without requiring a travel premium, check the SP's website for her preferred refreshments and gift suggestions ("Gifts are never required but always appreciated"), buy the gift, refreshments and mood music CDs, book the hotel 45 minutes before the appointment to allow time to shower and prepare the room (bring extra cash in case the hotel requires a cash deposit if you don't present a credit card), call the SP with the room number, prepare the room - bathroom, music, refreshments, envelope and lights, wait for the SP's call announcing that she is just around the corner or stuck in traffic, and be prepared to extend the room by another hour depending on how late she will be, and finally, be prepared for surprises - the hotel is fully booked, there is a problem with the room, the SP cancels after you have paid for the room, etc.
The bottom line is that if you find an MP who fully satisfies you, it can be a lot more convenient than seeing an SP.