At the reception, my older brother brought this up to me immediately, and we worked out the theory that mom had an affair that gave rise to my baby brother, and his decidedly different genitalia, and the divorce. None of us look strikingly like our parents, but we are clearly brothers, except for this newly discovered alien appendage on my younger brother. It was like seeing a great white whale breaching alongside dolphins. While my older brother, dad, and myself have fairly similar, if modest, endowments, my younger brother’s male parts were noticeably different (and “better”) than ours in almost every way possible: size, shape, even complexion (!). In the shower, there was a definite “one of these things is not like the other” moment.
I’m sure this was the first time all four of us were naked together, and it was certainly the first time I’d seen my younger brother naked since he was little. The facilities were spartan and we all ended up in a communal shower.
Recently, my father, brothers, and I went to a camping-style family wedding together. Our parents separated shortly after my younger brother was born and eventually they went through a bitter divorce. I am the middle of three boys and we are all in our 20s.