Preservation instinct : To protect oneself from agressions, fight to live or survive, is preoccupied with health problems, desire security, anxious about misery, poverty, food, death.
Food, security, money. "I am my body/I am afraid not to survive/Am I in security ?/there must be a way to feel immortal".
VERY CAREFUL OR INTO SELF DESTRUCTION (extremes).
Social instinct : Society, status, fears loneliness. Relationship with groups of people.
Tends to like alcohol, use amphetamines, cocaïne if on the bad side/excess
"I am the groups I belong to, I fear of not belonging, Am I famous/recognised ? I'd get what I miss inside by looking outside"
VERY SOCIABLE OR ANTISOCIAL (extremes).
Sexual instinct : Looks for The best mate or several partners. Desires intimacy and power. Libido is sometimes expressed into sublimation,
sometimes it turns into a spiritual link with God.
If the person turns bad and goes to the excess : Lsd, mescaline, poppers, ecstasy. _I'm sx I've only tried ginger

_
"I am my relationship to the other. Fears of not being desirable. Am I attractive ? I'd love to become myself and transcend into a link with the other."
PROMISCUITY OR ABSTINENCE (extremes).
I'm Sx/sp. So I'll not bring any comment.
Just something that can push you further in some reflection :
There are two enneagram schools about subtypes which have different theories.
The first one (external definition): the dom subtype means the more visible instinct.
The second one (internal definition) : the dom subtype means that this one must be treated first, even if it isn't the most visible.
For example : You have a good preservation subtype, social instinct has been hurt in a way, and sexual instinct has been strongly hurt.
In this case you have : a sexual subtype according to the external definition. A social instinct according to the internal definition.