This also is true. I learned a lot about masturbation in my teenage years especially from the farmers three sons.
This was the weekend after I had been wanked to my first orgasm by another guy.
I was back at the farm and sleeping over again and sleeping in Bills bed, so in anticipation of the same happening I decided I would sleep in the nude.
That night I went into the bedroom and undressed and got into bed and waited for Bill to join me.
A few minutes later I heard movement and whispering outside the bedroom door.
The door opened and to my surprise it was the older son who came in.
He was tall and thin. about 6'3'. Hope you don't mind he said but you're sleeping with me tonight, Bill thinks he has the flu coming on and doesn't want you to catch it, so come to my room and you can sleep their tonight, and he left the room.
Feeling a bit disappointed at not getting wanked off I got out of bed and pulled on my shorts and went to David's room.
He was already in bed reading a magazine. I could see from the cover it was a porn one.
As I climbed into bed he said, you don't need these on do you, meaning my shorts. I suppose not I said and took them off and laid them on the chair with the rest of my clothes.
As I turned to get back into bed David had his cock in his hand, it was enormous, probably twice the length and thickness of my own.
Bill told me you were good with your hands, would you like to see what you can do with this.
I couldn't believe it, did he think I was a wanking machine, although I didn't say it but I got excited at the thought and wasn't going to pass up the chance of wanking the biggest cock I had ever seen.
I knelt on the bed and took his cock in my hand.
It was semi hard but not for long.
As I stroked, it began to get harder and harder, the purple head oozing clear pre-cum and his foreskin gliding over the head with every upward stroke.
A bit faster he said, and I obeyed increasing the rhythm to the point that you could hear his balls slapping against my hand and his buttocks.
This as you can imagine was getting me aroused and by this time my cock was oozing pre-cum on its own. If I had touched it I'm sure I would have come.
David by this time was panting and moaning and seeing my hard cock he reached for it and wanked it as he did I couldn't hold back and came straight away. My sperm shot onto the bed with three or four spurts.
At the same time David's load shot in the air time and time again landing on me and him.
I kept hold of his cock and felt and watched it go softer. Still amazed at it's size I shook it from left to right slapping it onto his thighs.
David smiled and said 'Bill was right, you are good with your hands'
I continued to enjoy weekends at the farm for a few years after that with all three sons.