who is suffering from an identity crisis.

正陷入性格认同危机
This man can't accept his same-sex desires,

此人无法接受自己对同性的欲望
but he can't fight them either.

但也无法抵抗
He's most likely been repressing all sexual urges for quite some time.

他压抑各种性欲望应该已有相当长时间
The first victim, Craig Pickett,

第一名被害人克莱格·皮克特
represents a fall from the wagon, if you will.

可以说是重启了潘多拉的魔盒
Intercourse between the two men

两个男人间的性交
was most likely the unsub's trigger.

可能是嫌犯的触发点
Immediately after copulation,

性交后结束后
the male's serotonin levels drop.

男性体内的血清素含量会降低
The high is achieved during sex.

而在性爱过程中会达到最高值
That rapid change can manifest itself in extreme depression

那种急速的变化可能导致极度抑郁