>>6505089Personally, I think it's more believable.
Do a google search for "milk lines" to see what I mean.
Artists usually try to follow human anatomy and, while I can always appreciate a whole bunch of big boobies, it's more likely that the supernumerary pair(s) won't be as large as the primary set.
As an example...
These aren't necessarily believable:
>>6505623>>6503175>>6496411But these make more sense in regards to milk lines and basic anatomy:
>>6502112>>6492903>>6492902But they're all still fun to look at and imagine... :P