Sounds like they are sucking on each other- like already stated. BE CAREFUL though, and make sure they are in fact urinating. If there is a scab over the end of the penis, they will not be able to go. I have had them so that I literally had to pull the scab off before they go could pee, and that hurts, but it has to be done. neosporin is a great diea, but even better yet, separate them until they are healed if feasible.

It also may be a sign you are not feeding them often enough as well. Every 4 hours is how often you should bee feeding, even in the middle of the night.