I'm a big girl.. Like three roles and a butt that probably weighs 80 pounds on its own with thighs that do nothing but chafe bc they're so close.  Lol that's a problem on its own.. But my boyfriend is small.. Not his man hood that's perfect.. He's totally blessed, Supper fit.  Lately trying new things has been his thing.. Which is okay I like it sometimes but my body only allows me to do so much, that's why I LOVE being on bottom. He's been doing less and wanting me to be more dominant and sooo this riding thing has been an issue. It feels like my hips are breaking after a few minutes and then he wants me to try it backwards.. I can't do that either!!! Wanna try new things but I can't seem to figure out how to do it from a big girls position. HELP😭