Not a cuck yet, (working on it) but it is a common fantasy for a man to insert the Bull's cock into his wife. It signals consent to all parties involved and in some cases, there's a bi-sexual element to it. Are you concerned?
I am 100% straight and I find that hot, even hotter would be for me to have you pushing my cock in your wife's pussy for the very first time, that would be I believe, the only moment when I'll let another man touch my cock lol no offence to anyone and on the other hand I believe that that's what @emma33UK meant? Correct me of I'm wrong.