Ah, I remember my first fanfiction that I read (aka my only fanfiction that I read). It had male pregnancy in it.
One day I decided that I was going to finally read a fanfiction. I was just a wee little 14 year old and I only heard about the wonders of fanfictions. How they create the feels inside of you and how they entertain you for hours and the ships between your favorite characters and whatnot. So I went onto the interwebs and I searched for a Homestuck fanfiction (I was into Homestuck at the time). Then I stumbled onto a fanfiction that was about Hatsune Miku and Eridan Ampora. I was so excited because they had two of my favorite things. I started reading it and Miku and Eridan were all lovey dovey and it was cute. But then they went to Eridan's house...and they did things...things that I didn't really expect to read and didn't want to read....in painstaking detail...And so the next morning they woke up and Eridan was pregnant.
I read one but didn't realize it was mpreg. It was really bad. Like the guy gets pregnant but also has the mental capacity of a 5 year old and the story was just really weird. I stopped reading after he, a 26 year old man, decides to watch Dora The Explorer instead of helping the police find his missing boyfriend.
Oh yeah, the story was about how his bf goes missing but he he just spent the entire time, as far as I read, crying, eating spaghetti and watching kids TV shows.
I've only made the mistake of reading ONE of those kinds of fics. All I will say is that... it involved Harry Potter and Draco Malfoy. Also, Harry was the pregnant one for... reasons. >.>"
...I can only handle reading so much in fanfic about this kind of stuff.
I have, actually, and it freaked me out at first. I often read yaoi fics because sometimes those are the ones that are well-written with decent plotlines. The first fic I've read was sh*t, the second one was a little bit better (the genre was horror so all was good), but I tend to stay away from them. Usually the ABO!AU fics with mpreg tend to get a bit weird lol