Does "big girl" mean thick around the middle vs. thin. OR tall vs. short (body to proportion). A tall girl would be a better partner for standing positions. A petite girl would be better partner for positions where her weight is on him. Both girls would know what they are good at and what they enjoy.
The best sex happens with two people that are positive, secure and truly into pleasing each other. The size of those people has nothing to do with it. The attitude does.
Not true, size/body type, is a factor of sexual compatibility between partners. Your first sentence though I can agree.
I have never ever heard anyone seriously say bigger women are better in bed. I've heard on the internet, some people would say they try harder which is a really big insult in itself. Realistically, what do you care, OP? If your girl is great in bed, why do you need to convince other people that she is?
I'd assume if he can do it, a fat girl can. https://www.youtube.com/watch?v=HmMl3qV63OA&sns=em"]Ambush Contortion with "Fat Matt" Alaeddine - YouTube
any "have better sex" claims are always bull lol. (well most). I never heard that one before though; it might just be those "big girls" (who aren't even that big but think they're obese) saying some stuff to make themselves feel better.
I have a workmate friend who's in her early 30's who's only 4 foot 11 inches tall & she's very slim & petite & has possibly B cup breasts. She looks & sounds sexy & is very attractive to. I often try to imagine what she may look like without her clothes on. I feel like a giant standing by her. She's much shorter than me by about 12 inches.