According to Body Reading by Ohja Ohja, the testicles are called Mushkas in Sanskrit.
“The person having only one mushka meets his death by drowning. If they are not of equal size, he is a great flirt. If they are small the person is intelligent but short lived. Long ones indicate longevity. If they are globular and slightly rosy he is rich, if they have a dried up appearance he is poor. Persons having mushkas like those of horses, commit incest.
And here’s what Body Reading thinks the shape of your linga means
(a) Short (riches but no progeny)
(b) Thick (no wealth)
(c) Inclined to the left (no sons, no wealth)
(d) Inclined to the right (begets sons)
(e) Inclining down (poverty)
(f) cvered with visible veins (a few sons)
(g) Front portion hard (comfortable life)
Lingara refers to the front portion of the linga
“A lingara having the lustre of gold, silver, pearl or coral is commendable. If it is smooth, fleshy, evenly elevated, the man becomes a king and will enjoy women in abundant measure.
If it is elevated in the middle, the person owns a herd of cattle. If it is depressed in the middle he will beget more daughters. If it has different colours in different portions that is unfortunate.”
image taken at the penis museum iceland