Are you upset that I slept with Casper instead of you?
No, I didn’t. I’m glad that we didn’t
OmegaMan Answered question Jun 14, 2022
Not sure if this answers your question(?)
but it resembles
“Kids” (1995)
which has a character named Casper
and involves pre-teens having sex.
KIDS on Wikipedia
OmegaMan Answered question Jun 14, 2022