First time you cum/ejaculate

edit: sorry for the double post,, :(

7th grade
My best friend which was a girl always sat on my lap,she used to rub on my lap and I thought it was because her ass was itching,Then I knew what she meant and I took these "Bathroom breaks" that lasted 5-10 minutes.
It felt great and messy,I took a shower when I came home.

3rd year...
It was the time they thought us Biology..
Out of curiosity, I tried it and
BOOM ..It's history...