Guys, how old were you when you got for first hard on? how old were you when you got your first hard on due to sexual stimulation? was there anything differnt you felt between the two?
(emotionally or physically)

I was 10 and play doctor with a neighbor girl. Nope, no difference; I was aroused and erect.

First erection, wouldn't know as very young. First due sexual simulation - about 16, felt like i my cock was going to explode (in a nice way), the girl in question was fascinated by it. It was also first time for her, playing with a cock.

Extra one for you, First embarrassing erection, also about 16, got stripped by some girls, friends, in a fun way, and became erect, it was kind of awkward, i don't think they had seen anything quite like it before. erection still felt good but it was very embarrassing.

about 9 years old is about the first time I teased my hard cock before that I used to just enjoy it pointing vertical and pulling the foreskin back and I couldnt touch the head it was very sensitive and that scared me.

Can't even remember. 7. No.

I remember getting hard-ons when I was 3-4 years old, but I didn't know why or what they were. When I was 5, I decided to touch myself down there when it was hard. That felt really good, so I did it some more. In just seconds, I experienced my first orgasm. It was so intense, I nearly passed out. But, it felt so good, I started touching it again. In less than a minute, I had another orgasm so intense that I nearly fell out of bed! I was very happy to discover that it wasn't a one-time deal. I did it 10 times that day.

Regarding the feelings - I don't think it felt any different if I was already hard, or if I played around down there until I was hard. I do remember discovering that I could give myself an orgasm even without a hard-on.