LLP, I am not sure what to make of your data but from my own experience I expect at least two things are going on. First, any profile where bb is ticked is possibly more likely to be ticking other options (to a greater or lesser extent) indiscriminately.
Second, I find you get different results with the <bb> option ticked to the <unprotected sex> option ticked!
Some of this is error. Some of this is undoubtedly SP's inflating the number of services they offer (fk being the very obvious example). On some profiles SP's don't tick any option at all.
There is also another factor of SP's not ticking <bb> or <unprotected sex> but implying the offer in the profile by referring to "full" service or inviting you to call to discuss services...
My simple take out of this is that increasingly I search by <can accommodate> and geography with a limited range (2 miles from the postcode) without ticking any service options and then search manually.
I will have nothing to do with outcall - too high risk for me with an unknown quantity.
