Nothing beats having mastered the art of aneros relaxation to the point that I feel I can entice my ass to suck it in, let it slide back, suck again, slide around, suck it further in. Then my mouth, lips and tongue join together in the tiny exquisite motions. Squeeze. Suck. Caress the aneros. Tantalize the tongue.
This goes on, for a very long time.
The legs start quivering. The back tingles. The mind expands.
@WallyBanger , now lead your tongue to your palate behind your incisors, caress that spot, then lead your tongue on your palate backwards to your throat, envisioning your back palate as a counterpart of and directly connected to your prostate until you feel the vibes getting stronger and the stirr in your gland feels like you‘d lick it directly, then even imagine that, phew! :p