I think holding the Bulls cock and guiding it into your wife's vulva should be one of the bucket list items to do as part of the cuckold journey. There can be many things to do as part of that process - like watching your wife's reaction while you her married husband are guiding another mans cock to penetrate her. Also comfort her by kissing her while you guide another mans cock into her.
You are very right. It is at least our experience.
It happened during his third visit to us.
Her steady black lover was on top of her.
At a certain moment he ordered me to put his (unprotected) cock in her pussy.
I surprised myself by obeying him without any hesitation. I didn't even ask my wife if she wanted it too.
The only thing I heard her saying was "finally."
They french kissed each other as never before. So I knew I did the right thing.
My wife told me the day after that she heard her lover commanding me.
She: "I wondered what you would do and was pleased you did. As it should be for a real cuck. For me it was a very emotional act because my husband with whom I was married to for 40 years, gave me away to another man. For me a sign of unconditional love for me, a sign that I can fuck him bare from now on, being selfish. I love you even more now. I hope you will do it as many times as possible. "
Well, with him it became usual that I put his cock into her pussy while she could watch me licking her pussy and sucking his cock wet.
And I had always the sensation to be very close when she started to fuck him. She: "I really love to watch you witnessing from nearby that I'm fucking him. I know very well that I'm arousing you too, isn't it?"
Of course no pictures but screenshots.
I will post them within some hours.