[size=small]The guy cums in her brain. The juice is absorbed by a membrane that converts "will" from the sperm into a memory-language that can be encoded in the host (girl)[/size]
They eyes glowing doesn't really come from not pulling out. The shining eyes comes from her being pleased. This is all part of the "sex ritual mechanics" I was trying to figure out for a game. I think it was the first thread I made.
Finishing in her brain does make her eyes lose a little bit of their "self" as your splurging into her. They could or could not shine. Depends how well of a performer you are. And it's not about using the brain-sock (figure B) , again, eyes glowing is about pleasing her. It's a sperm induced signal that evolved to cuck betas.
Sorry for double posting.
Oh yeah, there was something else I wanted to add. Cumming on the eye is like a direct way to degrade a targets soul.