I work in the sex industry, I am completely fascinated with it and especially with the pleasure. I see sex like an art, a form of expressing your deepest and darkest desires, a way to release stress and a million ways of giving and receiving pleasure. It is such a complex part of our lives, that i don't think you can experience everything in only one lifetime. And this is why I keep trying and trying to find chemistry in bed, to see my partner willing to learn if he doesn't know, to learn my parner's soft spots, to discover his body, to explore every single centimeter of him(or her - although I stil haven't had a one on one session with a girl). It is indeed true that our bodies change. I have seen that in myself. When I was younger, I used to enjoy sex for just 15 minutes and then I would get bored. Now, I could fuck for an entire day and I'd still want some more the next day. I don't really know if this is a phase or this is just the way I am. Anyway, you will understand why I mentioned all the above shortly.
I was shopping one day in a sports store. I was in line, waiting for my turn to pay the stuff and the cashier asks me about some card. He told me it takes like a few moments to fill in the info. I accepted and gave him the info he asked for. Then I left. After a while a get a message from someone telling me that he is the guy from the store. He took my number and decided to try something with me. I asked him his age - 26 - young...but I decided to give him a chance. I am a straightforward person, so even before we met, I told him that we will meet at my place because I live close to my work and that I don't feel comfortable sleeping with him after we have sex, so he should go home after and sleep in his own bed. I think he was not very happy about the sleeping arrangements. The day we meet finally arrives. I go downstairs to pick him up, he has a nice bottle of wine, all good. 
We are now in the living room, on the couch, talking, then he starts kissing me. So I get on top of him and start moving down, heading to the cock. I could feel him pushing me, but I didn't say anything. Just a rookie mistake. I will let this one slide. And then I unzip his pants, take off his jeans and then his underwear, leaving the cock naked. I start sucking him. I can feel his hands on my head trying to push me. And just as he started pushing my head, my teeth immediately started clenching...oopsie...he didn't ask me if he could push my head before...that was his warning. He stopped trying to push my head. Good boy. But I couldn't help but notice his position. It was like the position the guys in porn use when they are getting sucked while sitting down. I think you know what I mean. One hand behind his head, like a relaxed position and the other on the head of the partner who is sucking him. Yes , i know they do that in porn, but that is porn, not real sex..
That was the moment I realized that we actually don't have too much information on how to please the partner, man or woman. For women things are actually quite easy because the sensitive area of men is sitting right in front of our eyes, up and hard. And yes, I mean THE COCK. For men things are a lilttle different because they have to search for that spot inside, they can't see there, so the feeling is all they have left. I am trying to be understanding because I know how difficult it is to please a woman. 
So going back to our story, I kept on sucking him and at some point I asked him if he is getting close to cum and he said he doesn't cum like that, he needs to fuck in order to cum. Well, that was unexpected...hehe...and then I ask him: "Do you have condoms?" and he replies "No, but I am healthy". My first reaction was to laugh in his face and to tell him that I will not take his word because when it comes to my health, I just don't. So I sent him to buy some. Luckily for him, the authorities hadn't yet closed the nonstop stores(this occurred in 2020), so there was a place he could go and buy some. And he did. And then the story moves to the bedroom...
But this is a story for another day. Have an awesome day!