Foxroxsox said:
I have the same issue, and had to go up to a size large to get a good fit for all parts concerned. I also generally pick diapers with a wider crotch area
Many diapers like Crinklz have a very narrow crotch. Others like Tykables Overnights and Rearz Safari have very wide crotches. That extra width helps to make room for your extra baggage.
I think it comes down to a combination of crotch width
and taping strategy. I've seen quite a few pictures of people wearing wide diapers "wrong". They have them taped so the middle of the crotch is pulled up snug against their body, often times in an "upside-down U" shape. It might feel good, but it's terrible for preventing leaks, and is going to put pressure on the boys.
I think it's a question of where the lower tapes are pulling in - the angle. If you attach them directly in toward each other, it's going to pull the middle up. But really what you want the lower tapes doing is pulling the
sides of the crotch up. This keeps the leg elastic and leak guards firmly against your body, but also allows the centerline of the crotch to fold downward and form a channel. This prevents pressure on the boys and also gives urine an easy path to travel from the front to the back where the padding is still dry. More comfortable fit, better leak protection. Just what you want from your diaper, right?
It's a little difficult to describe good tape aim, so I made a gallery awhile ago that I've occasionally added pictures to, to try to show what I'm talking about. I need to add a better picture of how I try to get the lower tapes to pull up on the outer edge of the padding though. In addition to being a good way to shape and snug the crotch, it also creates a folded area of padding high up, perfect for preventing leaks when laying on your side.
https://www.adisc.org/forum/album.php?albumid=1926
It's annoying how I've seen instructions on bags of medical diapers that specifically recommend taping the lowers inward. How do they not know this is a bad strategy??
It's also possible to get this effect with single-tape diapers. There, both the angle and position of the tape are very important. I've been unable to get a consistent taping on those without pre-taping an pulling up. (photo 10 in that gallery shows a rev1 cuddlz with single tapes pretaped and ready to pull on)