[request] [mfm] Threesomes or swaps where one guy has a bigger dick/accidental cuckolding related?

Anyone have any hot stories regarding threesomes or couple swaps where one guy has a larger dick or is bigger than expected? Maybe the [F] is more excited about the bigger one or they [FM] agree to threesome/foursome and didn’t know the second guy was really hung, GF accidentally discovered BF’s roommate is hung, etc. Thanks!

Source: reddit.com/r/gonewildstories/comments/8tb3y1/request_mfm_threesomes_or_swaps_where_one_guy_has