BDSM Dating in Naperville

How do you guys work on getting deeper?

I’ve had the littlest women completely devour me
And then a taller larger woman, with a bigger mouth only fit half of it before violently gagging.

Is it sheer will power?
Are all throats made equally?

Curious to hear opinions and tips and tricks.

Follow up, when throat training with a Dom what’s your favorite way to get prepped.