This is a link to the full pic of the thread image:
This type of photo doesn't seem that common but here are another two.
These two are examples of this although in the second there's a helping hand from a friend ... and a tongue:
http://prem.newbienudes.com/Photos/ViewPhoto.asp?ID=4765073&AT=C&PC=19&SB=&OB=V&PT=P&ref=z642970
http://prem.newbienudes.com/Photos/ViewPhoto.asp?ID=6230929&AT=C&PC=19&SB=&OB=V&PT=P&ref=z642970
http://smoothskinnedangels.com/nicolesolopreview/index.htm
http://www.cumilfgalls.com/galls/88d897/
from: Allisa Webb
girl showing me where she wants me to sniff nex.
http://hosted.lsgmodels.com/tmpl/fhp4.php?g=/fhgs/paula07
http://hosted.lsgmodels.com/tmpl/fhp4.php?gid=563&w=1476353
http://hosted.lsgmodels.com/tmpl/fhp4.php?g=/fhgs/paula03
http://hosted.lsgmodels.com/tmpl/fhp4.php?g=/fhgs/paula04
http://hosted.lsgmodels.com/tmpl/fhp4.php?g=/fhgs/stracy02
this lady like this pose Short haired Rebecca from Anilos
http://peachyforum.com/forums/t/short-haired-rebecca-from-anilos-274228.aspx
specifically:
http://images.anilos.com/galleries/rebecca/hot_mom/rebecca-2_042.jpg
from: http://galleries.anilos.com/samples/rebecca/hot_mom/
http://bustyparade.com/new_mature/3/0jq2e2/4th26c/9.jpg
from: http://bustyparade.com/new_mature/3/0jq2e2/4th26c/
http://www.momhotspot.com/Rebecca140310/pict/pictrebecca_2_1024_062.jpg
from: http://www.momhotspot.com/Rebecca140310/
http://bustyparade.com/new_mature/4/4ig285/l42b57/13.jpg
from: http://bustyparade.com/new_mature/4/4ig285/l42b57/
http://www.momhotspot.com/Lynika040908/