I guess I always knew I was a big shooter. And later on in my teens I had pretty ready access to Internet porn, so I soon learned that there was a wide range of orgasms from spunk slingers like me to the oozing style.
But it really wasn't until around 10 years ago (when I finally embraced being a slut) and allowed myself to have sex with a lot of partners that I began to realize how into it other guys were. I would always warn tricks, "hey, is it cool if I make a mess? I shoot a lot." And every guys was always like, "show me!"
Actually there was this ONE time where I didn't warn a guy. We were on his bed jacking each other off and I just came. It shot over him, off the bed and onto a quilt on the floor. He was kinda pissed. Apparently his grandmother had made him the quilt. I was super apologetic, but he pretty much kicked me out then. Oops!
These days, if I'm chatting on Grindr, and the guy I'm chatting with talks about loads or cum at all, I ask for his number so I can send him a vid. I feel like everyone has a pornstar super power and this one is mine. And it's a good one.
One more anecdote: I was in a communal sex space about 5 years ago. I was just playing with my husband, but a few other guys I knew were in the space too. A guy I'd just met recently (I'll call him T) plopped down next to us and whipped out a GIANT cock. And my husband and I looked at each other and we were like, "That looks like fun, but we've been here a while and it's late. We were really about to just jerk off and leave." And he was like, "Cool. Let's jerk off."
A few minutes later I came, and I just exploded all over the three of us... and another couple on a futon behind us. T is laughing and totally shocked. The other couple we're confused at first, but then when they realized what happened they were amused too.
When I saw T again at a party a few months later, he starts trying to get my friends to call me "Firehose" and "The Geyser." Occasionally, one of them still does.