Gender bending and bois

I have recently started working with a sub who is female but enjoys gender bending. She even calls me "Sir" :P. One thing I'm unsure of is how to use her being a boi as a form of humiliation and I was hoping for suggestions or ideas.

Interesting question, you see the story a hundred times in the opposite direction (male-to-female), but this is another perspective :)
Have you asked her what she finds so exciting about being a boy? I'd like to hear her intake as well.

Apart from how she imagines it, you could try having her dress up as a boy, wrapping something around her cheast to hide her breasts.
Stuffing a penis-form in her boxers or use a strapon. Not letting her sit on the toilet, but pee standing up. Let her try and give herself a blowjob, we all tried it once ;)
Depending how far you wish to take it... cut the hair, don't shave legs or armpits.
Fix things in the house, assemble an ikea cupboard, do it all in a jeans and tank top, don't shower for a week, watch porn, walk around in nothing but boxers and white socks, leave the dishes until there's something green growing on them, what else do we guys do? ;)

How do you see it yourself? What do you want to get out of it?

These are great ideas, after all the garage isn't going to clean itself :P I suppose I see it more in the way of making her feel like a little boi rather than a man. Since she is already involved in drag as a man and she enjoys being called a little boi I figured I could play more off it. She enjoys degradation and humiliation but is also a masochist. I guess I'm just a little lost as to how to incorporate all these things. I wish I had the honor of cutting her hair off but I'm afraid she beat me to the punch, although I do like the idea involving the strap-on. Thank you for your suggestions they are much appreciated. :)

Read the title wrong. *headdesk*