Hmmm, I think the cuckhold thing is a primitive thing that unfortunately gripes some of our fantasies, and for far fewer reality. Its primitive, erotic for some and darn well destructive. Sometimes we have to stop being cavemen and cavewomen.
I do confess to having the cuckold fantasy at times and that speeding up a climax in a major way. Would I want it to be reality - NO WAY!!! Do I try to push the fantasy aside and try for healthy fantsies - you bet.
Lately I have been 'programming' myself against the fantasy and now the idea of cuckholding, wife sharing etc. makes me go limp ...