I suppose there is some truth to the idea that on average a BBW may try harder, but that isn't really what draws me. It's the feeling of being on top of, and sinking into those curves.
There used to be a place on wertheim court that was staffed by Russians. Lana was a brunette with massive tits and really generous curves. She must have weighed a good 180 to 200, but it was all solidly packed goodness. On the first night I experimented with Viagara, I had the good fortune to find her on duty, after I'd already been with two other women that day. I was curious about the effect and strength of the drug, and have to say it passed with flying colours. Lana opened the door dressed in a body length black flowing dress, slit up the side to show her legs in black nylons and tight fitting top that could barely hold her massive breasts. Boiiiiing!
There was no massage to speak of. I was naked when she came in and at attention. We were all over each other and from a great session the thing that most stands out for me is the memory of bulling her from behind as she moaned and the massage table creaked from our exertions and combined weights. That feeling of pressing against her big body was so fantastic. Saw her many times after that...until she got too heavy for me.