Just always seemed to be more sensitive to the touch. Seems like women with smaller breasts are a bit more erotic but that's my opinion. Women I've known seemed to happier to be touched there and enjoyed more than big phony balloon titties. Scuse my French.
Male folk wisdom suggests that small breasts and slim ankles on a woman are a combination that makes dreams come true.
I can attest that if anything is lacking in size, the enthusiasm brought to bear more than makes up for any imagined deficit---or alternately, sexual activity is of a level that keeps both small.
And whether my conclusions are formed from research of the academic literature or personal research long past the point of being able to drawn an inescable conclusion.....is my business.
Surprisingly, there seems to be some truth in the small breast, thin ankle saying---if for no other reason it survives among the male culture in the USA. But unless you are a professional athlete, it does seem that smaller, fit people seem to have more energy in general---which by virtue of being in control of their bodies, makes them do many things with and enthusiasm born of confidence.
There is some simply physics involved here with kinetic motion that give an advantage to smaller humans.
And I'm not suggesting that smaller women are more enthusiastic sexually than other women. I am saying that any woman, whatever her physical characteristics is just fine for any man---and for reasons mostly unknown to us since we all admittedly have our own personal preferences.
My answer above was somewhat tongue in cheek. Great sex only happens when hearts, minds, and bodies reach out toward one another.
I've said it before and I'll say it again, size doesn't matter as long as they are natural. Her smile and eyes, and personality is what catches my attention. Breasts af all sizes can be such joy to... ahem. Better stop it here.
Benedict Arnold 