There is another factor. There's a profound implication that having a loving relationship is somehow incompatible with having a collection of what most people view as "toys".
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"You know how parents tell you everything's going to fine, but you know they're lying to make you feel better? Everything's going to be fine." - The Doctor
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"You know how parents tell you everything's going to fine, but you know they're lying to make you feel better? Everything's going to be fine." - The Doctor