Just look at this (altho possibly not at work):
The origin of the Milky Way
http://home.comcast.net/~ammawell/peterpaulrubensthemilkyway.jpg
Bacchanal
http://gemaelde-archiv.gemaelde-webshop.de/gemaelde/std2/paul-peter-rubens-bacchanal-08624.jpg
and he did this kind of thing more than once:
http://www.wga.hu/art/r/rubens/22mythol/27mythol.jpg
Cimon and Pero
http://www.erudit.org/revue/ron/2001/v/n23/005988arf022n.jpg
Hey, the Romans thought this was filial piety at its highest NOT disgusting
and nasty.
http://en.wikipedia.org/wiki/Roman_Charity
A theme the Dutch liked; this is in the Rijks:
http://www.rijksmuseum.nl/images/aria/bk/z/bk-am-51-11.z
Someone is totally obsessed and has collected a bunch of versions:
http://regard.s47.xrea.com/romancharity/romancharity.htm
I don't know all the artists. Greuze's doesn't show contact.
http://www.spauda.lt/menas/caritas/greuze.jpg
This one is Deshay's:
http://www.sternburg-stiftung.de/gemaelde/bilder/1838_deshays_cimon.jpg
Here are some more:
http://homepage.mac.com/eeskenazi/saturno_ilust.html
Note the manuscript page caption: the natural process! Poor woman.
I think that's from an alchemical manuscript, the Aurora Consurgens, and is intended to be understood allegorically. A bit more:
http://www.celtoslavica.de/imago/_aurora.html
And probably my favorite, despite it being yet-another-in-the-Mary-nurses-Jesus-line
http://www.abcgallery.com/R/rubens/rubens62.jpg
Look! She's bored and reading a book!
Seems to me that you could write a substantial article about the meaning
and uses of breastfeeding and illustrate it exclusively with Rubens pictures.
I was a little startled to realize that that Milky Way legend was used
by more than one artist (Tintoretto did one, too, but that may be the extent of it).
Here's another one, in this case, the breast is being offered in a relatively
standard C-hold:
http://www.nationalgallery.org.uk/cgi-bin/WebObjects.dll/CollectionPublisher.woa/wa/work?workNumber=NG46