The feelings a cuck gets by doing this can be very emotional and a bit humiliating. You're assisting your own cuckolding, not just watching or hearing about it. Especially for someone like me. This is the only time I deliberately touch another cock. I have very little interest in cocks although I do like to see another cock get hard because of my wife. But to take another mans cock in your hand and guide it into your wife, to watch your wifes pussy open to except him and see him disappear into your wifes pussy is out of this world. To know you jut put another mans cock in your wife is both arousing and humiliating. My favourite is for my wife to face me while he spoons her. I guide his cock in and leave my hand in place to feel both his cock and her pussy as he fucks her. Its awesome to watch another man fuck your wife but to feel it in real time is a whole other level. Im actually feeling my wifes pussy, how her lips react to his cock in her but I can also feel his cock going in and out. The climax is feeling his cock pulse as he cums inside her. Again its great to watch another man cum in your wife but to actually feel his cock pump his seed into your wife in real time, leaving no doubt as to what is happening as it happens is intoxicating.