Seeing my wife pleasures has always been something I love from swinging to now being in a cuckold relationship.
Also, enjoy forms of humiliation or being teased by my more noticeable bedroom inadequacies.
For me, this IS a part of it. I'd never humiliate someone, it's not my cup of tea but the mind starts to feed off itself:
"Honey, are you really going with Him?", "are you enjoying this?", "do you secretly WANT this but didn't tell me?", "how long have you felt this way?", "do you still want me?", "suppose he comes back for her?", "will she stop him this time?", "what if the family or friends find out?", "you want me to WATCH?", "Are you really going to put it in your mouth?", "you let him cum in your mouth?", "you want me to clean up?", "where are you going at this hour, dressed like that?", "are those new shoes?", "you're wearing that for Him?", "what do you mean, he TOLD to you?", "Honey, do you mind if I suck his cock?", "Honey, do you think if I put my ankles to my ears I can take Him deeper?", "Honey, does this make me look fuckable?", "Honey look, he texted me this dress to wear.. do you like it?", (leaving church)" Honey my phones dead, can I borrow yours to text my Bull... I'm SO jonesing for black cock?", (unpacking groceries) "you know I hate Cucumbers but it reminded me so much of his this cock I bought it anyway!", "Honey massage my hand, it hurts; I spent 20 minutes jacking him off over lunch!", "Honey stop complaining, you know he loves this color on me!", (text from wife) "Honey stop at Macys after work, pick up a tube of "coral splash" lipstick; when I wear it he can't stop kissing me", "Why are you wearing heels and lingerie around the house? Honey it's my "uniform", I'm not allowed to take them off when we're together!", "Did you fall? no Honey, I got spanked for wearing pants instead of a skirt!" etc. etc.
To me, it's harmless fun that totally engages the mental and emotional, making the physical even better.