Yes, it allow me to carry my weight up high, like a weight vest, so I can successfully hold bigger sails for more constant speed, and to block other sailor's wind, while causing a bigger wake for them to try to sail thru.
Also, I've had 3 ex girlfriends who not only played tennis (not well, but at least they played), who had breast implants while I was their boyfriend, so I got to see the changes in their movement and game.
I also had two ex girlfriends who didn't have breast implants, ever, and saw the lack of change in their tennis games.
Oh, when racing slalom, I prefer about 22 lbs of weight around my torso, something implants might have a problem fullfilling. That's like 3 gallons of silicone.