Lionel Mandrake
Lionel Mandrake's JournalMathematics of Sex
My earlier thread on 'Oral Sex Etymology' appealed to one of the "Two Cultures" described by C. P. Snow. For proper balance, I thought it advisable to offer another thread which would appeal to the other "Culture", (i.e., nerdy, scientific types).
I shall grossly oversimplify the rich variety of human sexuality as follows: every person has one of two genders (M or F) and one of three orientations (S, G, or B). There are thus six types of people. Each entry in the following table is a '1' if the type of person indicated to the left can perform a particular act (designated by the letter 'C') on the type of person indicated above.
[font face="courier"]
| M | F |
C | S G B | S G B |
____|_______|_______|
S | 0 0 0 | 1 0 1 |
M G | 0 0 0 | 0 0 0 |
B | 0 0 0 | 1 0 1 |
____|_______|_______|
S | 0 0 0 | 0 0 0 |
F G | 0 0 0 | 0 1 1 |
B | 0 0 0 | 0 1 1 |
____|_______|_______|
[/font]
All the entries in the first three columns are zeros, because the act in question can only be performed on a female. All the entries in the fourth row are zeros, because a straight female would refuse to perform any sexual act on another female. Can you explain the other entries in the table?
Here are tables for two other acts that people sometimes perform on other people.
[font face="courier"]
| M | F |
F | S G B | S G B |
____|_______|_______|
S | 0 0 0 | 0 0 0 |
M G | 0 1 1 | 0 0 0 |
B | 0 1 1 | 0 0 0 |
____|_______|_______|
S | 1 0 1 | 0 0 0 |
F G | 0 0 0 | 0 0 0 |
B | 1 0 1 | 0 0 0 |
____|_______|_______|
[/font]
[font face="courier"]
| M | F |
T | S G B | S G B |
____|_______|_______|
S | 0 0 0 | 0 0 0 |
M G | 0 0 0 | 0 0 0 |
B | 0 0 0 | 0 0 0 |
____|_______|_______|
S | 0 0 0 | 0 0 0 |
F G | 0 0 0 | 0 1 1 |
B | 0 0 0 | 0 1 1 |
____|_______|_______|
Easy questions: what do the letters 'C' and 'F' stand for?
Harder question: what does the letter 'T' stand for?
On edit: Following is an advanced topic which assumes you know how to multiply matrices.
The 6 by 6 matrices C and F are related by a similarity transformation:
C = A F A and F = A C A,
where A is another 6 by 6 matrix:
_ _
| |
| 0 0 0 1 0 0 |
| 0 0 0 0 1 0 |
A = | 0 0 0 0 0 1 | .
| 1 0 0 0 0 0 |
| 0 1 0 0 0 0 |
| 0 0 1 0 0 0 |
|_ _|
The matrix A represents a permutation which replaces males with females, and vice versa, while preserving the orientations S, G, B defined earlier. The matrix A is symmetric and is its own inverse, i.e.,
A A = I,
where I is the identity matrix:
_ _
| |
| 1 0 0 0 0 0 |
| 0 1 0 0 0 0 |
I = | 0 0 1 0 0 0 | .
| 0 0 0 1 0 0 |
| 0 0 0 0 1 0 |
| 0 0 0 0 0 1 |
|_ _|
Oral Sex Etymology
For your amusement and edification, here are the etymologies of two clinical terms whose meanings are already familiar to you:
"fellatio"
ORIGIN late 19th cent.: modern Latin, from Latin fellare ‘to suck.’
"cunnilingus"
ORIGIN late 19th cent.: from Latin, from cunnus ‘vulva’ + lingere ‘lick.’
There is a vulgar word (which I won't repeat) that you might think was also derived from "cunnus", but the facts are otherwise:
ORIGIN Middle English : of Germanic origin; related to Norwegian and Swedish dialect "kunta", and Middle Low German, Middle Dutch, and Danish dialect "kunte".
Profile Information
Gender: MaleHometown: The Left Coast
Home country: USA
Current location: electrical wires
Member since: Sun Jul 1, 2007, 06:47 PM
Number of posts: 4,076
