Now this fine Shemale is skinny! Just the way I like them. Now there is something you should know. and I tell this to you not to brag but as general information. If you have a big dick, try to avoid the skinny queen’s. They are just not used to being penetrated by that kind of mass.
From Tranny Island 
Her spindly thighs don’t look much bigger than his dick. It’s not surprising that such a weakling crumbles like this.