After considerable training and extensive fun, I find myself able to activate my anal sphincter into synchronized twitches and spasms, by wiggling my tongue in and out. Even, without the aneros in me.
Add nipple tickle and I'm into neverland....
Wonderful.
Hey, @WallyBanger, thanks for that cool suggestion and the strong chairgasm on first try. It's unbelievable what remained undisclosed to me for my first five decades. Life is wonderful!
Back in the archives there are good cues for mouth action. Soft pallet sucking with the tongue etc.
I like dedicating one hand to my torso, (alternating Male Deer Exercise on my Dan Tien with Testicle massage. I use the other hand to alternate between Nipple action and stimulating my lips (wrinkles on the back of a knuckle work well) while rubbing my soft pallet with the tip of my tongue. Toss in a bit of breath control and KSMO and it really 'greases' the orgasm.