Using Anal Eze is a bad idea and dangerous. The recipient needs to be able to feel what is going on. Being penetrated should not hurt. If it hurts, the person penetrating you is not doing it correctly. Do not let a provider use lubricant with numbing agents on you when they do you with a strap-on! It can cause you to bleed internally or become seriously injured! See a provider who knows how to pleasure you without needing to numb you from the experience. When you are being penetrated, if you feel pain you need to ask the provider to stop immediately and apply more lubricant. With numbing agents, you will not know that there is too much friction and that you are bleeding internally until it is too late. Some minor bleeds are relatively harmless, but obviously numbing agents in this territory are bad news because even minor bleeds are no fun and major ones can be life-threatening.
My suggestion to the OP is that you can also always bring your own dildo to ensure that your provider can use a size you like if you are particular about it. Any experienced lady should as be able to do some additional "warming up" if your plug didn't get you quite relaxed enough for whatever she has in mind. If you bring your own dildo, though, make sure you get one that is compatible with a strap-on (wide base, usually no balls) if having her thrust her pelvis into you is particularly important to you.