Heterosexual non-op ladies, how do you go about telling him you do not want SRS?

[DebbySoufflage]

Hi everyone,
so I'm Debby and I'm a straight non-op lady.
I mostly date cis hetero men.

Usually I'm ashamed of telling him that I never plan on having "the big operation" .
For one or another reason many cis people seem to think that transition is all about having SRS.

So it sometimes happens that I meet a wonderful straight cis man, that we hit it off, that he knows about my genital configuration and that he proceeds to ask when I will have the big op.

I mostly beat around the bush instead of telling him "never".
I'm even slightly ashamed of myself for not wanting GRS.

So to other straight non-op MtF ladies out there, how do you tell him and when do you tell him that you don't plan on having the big operation?
How do men react to that?

Luv,
Debby