I discovered how great the electric vibrator was and to this this day, oral sex is great foreplay, but it's never an end to creating my orgasm.
You might want to consciously begin to tone your pelvic floor muscle.
The trembling usually means you are about to have an orgasm or you've just had one and are experiencing after shocks of pleasure.
The gag reflex can be embraced and then our attitude toward it can be altered.
Using some kind of additional lubrication for BJ by either hand or mouth is VERY important.
My technique was to incorporate the reflex into sucking his dick instead of fighting it.
I've also had a few lovers that adored a musky pussy.
Why is it so difficult to ask a lover what they like instead of guessing with no actual experience to back you up?
Either sacrifice your desire for oral sex or get another lover.
This is such a perfect example of a woman protecting the male ego!