Hello again i definately know the feeling.
I was in a three year relationship with a girl who was also a survivor.
The times I felt most triggered during sex with her were:
a) If I was already triggered (duh)
b) If I felt like I had to to keep her with me.
c) If she asked and I felt obligated
d) To escape ssa thoughts or painful emotions.
e) To prove my masculinity to myself and her.
That's about it. Hope that helps.
"In my life, I have seen,
People walk into the sea,
Just to find memories,
Plagued by constant misery,
Their eyes cast down,
Fixed upon the ground,
Their eyes cast down
I'll keep my eyes fixed on the sun"