Shortly before we split up, there were plans to try to have a baby. Of course, I had cum in her more than once and twice and nothing came of it, so the suspicion was raised that I might be infertile. To be sure, this had to be checked, so I went to the doctor and asked about fertility tests. It's nothing particularly fancy, you just have to take a sperm sample to the lab and wait for the results.
The principle is actually quite simple. You have to sperm into a tank, then bring the sample to the lab within two hours and you can wait calmly for the results.
The other day, when I thought I had to take the sample to the lab, I obviously decided that it wasn't going to be a normal milking into a cup, but you have to have a good time. My girlfriend wasn't home at the time because she was at work. It would have been quite silly for me to ask her to fuck me and at the end take my cock out of her cunt and cum in the cup. So I decided that I would just do it alone, when she wasn't home and didn't know that my cock was being milked by hand.
At that time we were still very well behaved in bed, but my girlfriend didn't know that I liked to play harder. So to take a sperm sample from my balls, I decided to have some fun. I stripped off all my clothes and started masturbating in the room. Of course, it wouldn't be good masturbation if I didn't give myself some extra extra fun. I went over to the drawer where my girlfriend kept her underwear clothes and among them was also hidden a toy I had once bought her: a pink vibrator, which we didn't use too much during playtime, because somehow at the time we didn't know how to admit to each other that we liked such an extra attraction.
As soon as the vibrator appeared to my eyes and I grasped it in my hand, I already knew that it was going to be rather rough fun. I also took some lubricating gel from the drawer and applied it to both the vibrator and my ass hole. The fun began both in my ass and with my cock in front.
It lasted about 10 minutes and after that I had to drain myself into the container, wash my dick and ass, get dressed and quickly drive the sample to the lab. I recently found a video of the event. At first I thought it was disgusting to record myself while also vibrator-fucking myself in the ass and masturbating. However, after that, when I turned on the video and started to watch myself play, the excitement started to build up. I could see myself squatting in an almost like cowgirl position on the dildo, or rather the vibrator, riding myself and pushing the toy deep into my ass.
After a few minutes, I laid down on my side, grabbed the toy by the base and started riding myself in the ass as if someone was fucking me in the ass with a strapon. All the time, of course, my other hand was massaging my cock and driving it every step further to ejaculation. As this had happened many years ago, I did not remember what I was doing at the time and it came as a very big surprise when I saw how I had suddenly slipped two fingers of one hand into my ass and added a vibrator with which I began to stretch my sphincter. At one point I saw that in the video I had put the toy aside and I slipped two fingers from each hand into my bottom and started stretching my hole.
I thought to myself at the time: "Oh shit, I let myself get fucked by myself as if I were being fucked by some big black cock". But then the toy was back in my hand and I was once again squatting on it and massaging my cock at the same time. After about maybe 10 minutes I saw that I was nearing the end of the video and so I did. At the end of the video I once again slid the vibrator up my ass and squatted down hard. I grabbed my cock in my hand, took the cum container with the other and moved it to the tip of my penis. After a dozen or so strokes, I deflated, I put the container aside then stood up and pulled the toy out of my ass. The video ended, and I thought, I'm probably never going to get out of this addiction to cumming and masturbation.