Some further thoughts....

I had to tip the nose of the Brooks up a bit; otherwise, I kept sliding forward on the smooth leather. I believe it's common, though not universal, for riders to tilt the Brooks up slightly.

If you tilt a saddle too far down, you'll put extra stress on your arms. Protect yourself.

My take is that anything that presses on the pubic nerve or blood vessel can cause perineal numbness. I think that's most saddles.