I started canoe camping before puberty, but after puberty I tended to imagine that any male-female couple I saw camping must be having sex in their tent. A reasonable conclusion (although when I got older it was not very true for me and my wife).
One day I was exploring a small island on which I had camped with some other guys, and discovered that a couple had camped on the other side of the island, which was probably only a couple of hundred yards diameter, but had dense woods with few paths.
Being somewhat of a voyeur, I was hoping to see some sexual contact. The male seemed to be ignoring the woman, who was middle aged but not flabby- a ponytail and nice tits in a T shirt and short shorts with wide legs. Nice rear end also. She was being very attentive to him, offering kisses and even grabbing at his crotch once- but he was gathering his fishing gear and finally got in the one canoe, and paddled away.
I considered watching more, but instead I just blundered into their campsite- as if I had been exploring the island (which was true) and had just arrived at her campsite (not true).
I gave an alert, "OH!" ... "sorry, I didn't know anyone else was camping on this island- my friends and I are on the other side."
I was probably going to blunder back into the woods, but she quickly asked if I wanted some coffee. "Sure! we usually have a cold breakfast, no fire- coffee would be GREAT."
I was 18 at the time and a freshman in college. She had to be over 30, but had all the parts of a woman and was actually very pretty even without makeup.
I accepted the mug and she poured the coffee- then made a very slow effort placing the pot near the fire, with her butt toward me (and not that far away). I imagined I could smell her pussy, and actually the leg holes of her shorts were big, and I imagined I could see some pussy hairs hanging down when she bent over- what I could not see was any panties!
I had NO idea how to propose sex to this woman, but the coffee was really good and so I started talking about different lakes we had been to. She started talking about how her husband had left her to go fishing, even though they had been fishing the day before and caught nothing.
I asked how she liked sleeping on the ground, and she explained that they had a really good air mattress that filled their small tent- so the ground was not a factor. I explained that I had never used an air mattress- and she offered to let me "try it out".
As I started into their small tent, she suggested I take off my boots so I didn't get dirt in the tent. As I kneeled, my knees did touch down to the ground when they compressed the air mattress - and she explained that I needed to spread out to prevent contact- and once I did that (and agreed that it was really comfortable- she explained that it was inflated for two people- and she hopped onto the air mattress next to me.
"What happens if your roll together?" I asked. "I have never slept in a bed with someone else, much less on an air mattress."
"Oh..." she explained.. and laughed... "the air mattress is soft for sleeping, but for sex, it is not like a bed at all. Let me show you."
WOW! I was wondering how to bring up the sex idea, and she was way ahead of me. Of course she knew I was interested, because I already had a hard-on from when she had bent over in front of me!
She undid my shorts, and slipped them down and was sucking my cock before I could say anything, but what would I have said?
"Have you ever had a girl do that before?" she asked.
"No, but I certainly like it. I don't want to make a mess though."
... was the way I put it.
"Why don't you go ahead and make a mess in my mouth!" she suggested, "and then you can help me with something for a while before you get too excited again- I understand what it is like to be a young man."
She started sucking and licking again, and it didn't take more than a minute before I had come in her mouth- and she swallowed it all. Then had her shorts off, and moved up so her pussy was in my face. It smelled really sexy, and although I was not sure what I was supposed to do- she was way ahead of me and suggested EXACTLY what she wanted me to do, and while I was doing it she commended me. She also described what she knew other women liked and had me try that (but she liked exactly what I had been doing first and told me to return to that). She really did seem to be enjoying it- then suggested that she could lie down- and when she did she flopped her legs far apart and pulled up her knees- "put a finger then two in me while you are licking like you just did, OK?"
Easy enough, but even though it had only been 5 minutes, I was already getting another erection.
She was watching, and encouraged my cock with her hand... and commented what a nice thick cock I had.
"Would you like to learn some sex positions?"