Right the manpages kind of poorly writen. Should have an example usage.
The flags should be listed similar to item of a list rather than hunt
them down. 

It really starts out confusing.

If -c is specified, sshfs will instead launch thecommand specified by cmdline and if -p is specified, sshfs communicates with an SFTP server via stdin and stdout

I guess I go with -p 

Unless -M is specified, sshfs will mount itself at the mountpoint specified by mtpt. Okay so I need mount point

cpu% sshfs -p williamgunnells@172.27.0.68 -m /Users/williamgunnells



.
sshfs: received garbage
cpu% sshfs -p -d williamgunnells@172.27.0.68 -m $home/sshdir
SFTP --> SSH_FXP_INIT



Why make it more complicated. 

see bind(1)) with -c. -a and -b have the save function as they do with 
mount. What?

So now I have to look at bind(1)

Does that have -a -b

Yes -b Both files must be directories. Add the new directory to the Beginning of the union directory represented by the old file

oh and -a is end of the untion

Hmm I wonder if there is an example in bind(1)

NOPE

It does have an example of mount /srv/boo /n/dump dump

sounds logical

What does that have to do with sshfs again now. I forgot