my young niece sucks me off

I'm an old man to a niece who looks younger than her 15 years. She is curios about a man's penis, so I get her to suck me off.

I am 65, and my niece is 15, petite and though she looks much younger she is very precocious. She and I have always had a very good relationship because we are both very interested in biology. For example, when she had her first period, I explained what was happening shops to live with it.

Since then she has talked about “her body” and how it is changing just as naturally as if we were seeking about the weather.

Uncle Waldo, at school today the lesson was sex education and the teacher showed us a diagram of the male parts. But I can’t imagine what it really looks like. A line drawing is not very helpful. You’re a man, Uncle Waldo, can I dee yours please. I really want to know all about a penis.

I was pleasantly surprised at her request, and as the house was quiet and we would not be disturbed, I agreed to let her take a look at mine.

“I’ll show you mine, but we will have to talk about it to be sure you understand the biology”….

“OK then, here we go” and I took off my trousers and boxers. I keep my pubes trimmed so it was easy for her to look.

She pulled up a chair and sat in front of of me to get a really close look of my dangle-bits.

“Gosh, it’s like a long sausage, isn’t it”. She reached for my cock and took it in her hands. “It’s getting bigger. I can get both hands around it. What’s this ruled skin at the end?” She examined my cock very carefully, noting the size and the shape and the fact that I had an erection.

“There is a sack at the bottom with two large round things”.

Those are testicles and they make the sperm. Remember when you had your period we said that ovaries make the egg cells. A man makes millions of sperm every day, but a woman normally releases one egg each month.

She put both hands onto my balls and gently moved them inside my scrotum and generally played around with them. I really didn’t mind at all.

“How does the sperm get out of the testicles? Can I see some?”

“If you look at the top of my cock you can see that the rumpled skin covered a smooth end that is sometimes called a bell. Pull back the skin and you’ll see.”

She was very gentle as she drew my foreskin back over my glans. “There some fluid oozing out of that hole. Is that sperm?”

“That’s called pre-cum and men make it so that the end of the penis is very slippery and can fit easily inside the vagina”.

“So how can I see some sperm?

“You can see my sperm, but there is something that you have to do to get it out. Push the skin backwards and forwards over the end. Do it slowly and for a long time. You can make it easier if you put your mouth over my cock and suck it”.

She wanked my cock for a while and could see that my pre-cum was flowing over the end of my cock. Eventually, curiosity got the better of her and she put her mouth over my cock and started to suck. 

“in a few moments my sperm will come. It will flow into your mouth, but that’s OK. It may taste a bit salty, but most women like the taste, and it’s OK to swallow it”

She continued to suck my cock and as I explained, I shot my load into her young mouth. I knew it was her first time but not her last.