sigh,
being a fat lady rider means every one assumes they will be faster than me, so I get this alot--even on group training rides where my nose is about two inches away from the butt of the rider in front of me, people will pass and then try to insinuate themselves into that two inch gap, making me slow down to let them in (of course,I'm exaggerating about the size of the gap, but people do seem to need to be in front of me even when there is no space in front of me and it's not like I'm holding anybody up)