In the presence of yum-yum he is that most appealing figure, a strong man in love torn between desire and duty.
He explains that a year before he had fallen in love with yum-yum, who returned his affection.
He is labouring under great excitement, and begs for information as to the dwelling of "a gentle maiden, yum-yum."
An exclamation of pleasure, esp of sensual delight (1878+)
Something sweet or pleasant, esp to eat (1889+)
[perhaps fr a locution used with children, hence contextually as well as phonetically related to tummy or tum-tum]