g-spot stimulation

A client who is interested in getting some male genital piercings posed the question to me:

I'm very interested in genital piercings. Can  you tell me if this is too much to begin with?

the pubic,
frenum ladder,
dydoe, and
guiche

is that too much?

My big question is, "which gives most pleasure to my female partner?"

Thanks Elayne!