A comprehensive demonstration of mammary physics is visible in comprehensive detail in this gallery; all manner of oppai squeezing, groping, fondling and even chastely covering is featured, with breasts of all shapes and sizes in evidence.
Idols and amateurs of all stripes seem to enthusiastically join the antics:
Is it just me, or does 71 have huuuuge hands?
76 and 82
#33 is sweet
*wants more*
114 no squeezing
114 fuckin
http://img3.sankakustatic.com/wp-content/gallery/breast-squeezing-idol-gallery/breast-squeezing-fondling-groping-oppai-mania-096.jpg <—perfect