Your wife loves to taunt and humiliate you, especially when it comes to comparing dick size against yours. She loves taking snapshots and sending them to you to see how well you compare against them. Chances are their cocks are way bigger than yours.
You know that when it comes to dick size, you shouldn't even think you can measure. Does that upset you, and do you love it when your wife taunts you regarding dick size?
Constant bombardments, reinforcing the sad fact of a cuck's inadequacy (usually joyfully encouraged by her lover) can result in a husband's impotence. Trying to desperately get it up in her presence will only justify more why she needs to see a real man. Although the marriage is fine in every other aspect ( or advantageous for her) because it is so distressing for the husband, he will not want to bring up the chance of having sex for fear of more embarrassment. This is the moment when his wife can actually encourage, and watch, her hubby relief himself whilst looking at the pictures that caused his predicament in the first place. (she can obviously take a surprise snap while he's doing it - for the Master's amusement! )