I have some difficulty choosing because there are several, and they always involve my wife's feet. But perhaps I'll choose these because they aroused me tremendously, compelling me to masturbate and spill all the semen into one of her shoes. My wife was dozing on the sofa and didn't even notice; and I didn't want to spoil the moment by waking her, as that would diminish the excitement caused by the secrecy of the moment.