Thumb rests
From Voyeurweb's Wiki
A slang term referring to Sacral dimples, the small lower-back indentations whose only known purpose is to show a man where to position his thumbs during Doggy Style sex.
A slang term referring to Sacral dimples, the small lower-back indentations whose only known purpose is to show a man where to position his thumbs during Doggy Style sex.
