My personal accounts of applying these ideas in practice:

The tactile directions of follatio can be applied. I have no capacity to determine if they should, or if all of these tactile directions work. It's been easy to adjust the points of reference of how deep the Director's penis would penetrate their friend's mouth, and direct the ongoging motions of that variable.

What's more difficult is establishing a reference level of suction pressure, and changing that. The Director's ring and middle fingers can't hold heavy weights just between them, while not resting on them, so the range of pressure that can be applied to their partner's finger is considerably limited. If, perhaps, the Director's thumb and middle finger gripped their partner's finger, this range of pressure may be extended, therefore their partner would have an easier time detecting differences of strength in their partner's grip, and maintaining an established level of pressure for a certain strength of finger grip.

And the Director's index finger may direct their partner's tongue. Personally, I saw no point with any tongue Directions if a penis' sensitive glands are covered in latex, unless the Performer likes to savor flavored condoms in a certain way. But they could do that without a horny cis man involved. I guess they'd maybe slip it over a cucumber or toy if the same texture is preferred.

Trying the proposed directions for an oral performance on their vulva, initially on eachothers' bellies, can prohibit breathing if their back is upright, and any sucking is expected. There isn't much to suck on a bent knee, but nerves against bone can be more sensitive. Trying these on nipples is easy: establishing mouth pressure and location points of reference, tongue pressure and location points of reference, directing the ongoing motions of tongue and mouth, establishing a pattern without the constant need for tactile direction, increasing, and decreasing speeds of that pattern. In this case, the Performer's neck may tire without support there.

That presumes the person who understands this line of thought starts out as the Director, explains to the Performer, and they depended on vocal communication in the process of understanding the idea. I presume this would be easier for those acclimated to a standard manual sign language, or a common tactile language like those in braille or protactile, to understand. I just never practiced this with such a person.

If there was a line running from the top of their spine, across and along their scalp, directly to their nose, one hand stays on one side of that line, another hand stays on the other side of that line, then it's easy for the Performer to differentiate tongue directions from mouth directions.

It's been exhausting to run my tongue across someone's body while my lips don't surround it, and it also dries out on skin that won't sweat.

Before my mouth was on their vulva,
I was often feeling light headed from a lack of sleep,
ejaculated twice the day before, once more the day before that, and rode a bicycle, that propelled not by electricity, but gravity and muscles, 25 miles, climbing at least 1000 feet, against the wind,
when I didn't use such a bicyle at all for weeks. I'm also almost 40, not 20-something when I first thought of these things.

These directions may be more practical more often if applied to the Performer's forehead, while pattern memory directions can go elsewhere. Then the Director can lie down and still reach their partner's head. This increases the number of options of where this can take place in a shorter amount of time, and the Performer probably wouldn't need to keep their neck held back at a sharp angle for so long. My neck at that angle, while my mouth attempts any suction at all, and my tongue moves up and down on their vulva, made me stop as soon as they got a pattern down. Maybe my airways were also constricted around this time with my face against their body like that. I could not continue that performance longer unless 1) I was really horny, and 2) I really loved them. Neither were true. This was a self indulgent pursuit. Partner was like "wait, I thought I just got a pattern going, why did you stop?" My tongue and lower lip may have been closer to their urethra, as my nostrils and upper lip were surrounded by their lips. This is not a comfortable experience to breathe in, thus maintain.

Then we were in a position where their vulva was at a higher level, and my neck's angle wasn't that small. Spreading their lips with my fingers, as their thigh limited my options of where my elbow could go, put my wrist in an uncomfortable position. Their hands could have established a pattern, then they could have used their own hand or clips to spread their lips. But, I tried to suck while moving my tongue around again, and my tongue and lower lip was going down towards their vaginal hole. I'm not sure then, but I think my breathing may have been partially or intermittently blocked at that time as well. Anyway, the pattern didn't make me less tired, and as soon as they stopped a constant direction, like over 4 cycles of a pattern, I disobeyed my own principle, and moved my mouth away from them.

They said they were not in an ideal setting to enjoy such a performance when they had to think about how to communicate in this way. And they couldn't really tell where my tongue was unless it was directly over their urethra.