Moni that's not exactly what I'd call hypnotism, more relaxation and somnolence assistance. Hypnotical subconcious suggestion/manipulation from another person is something I personally would avoid like the plague. I guard my subconcious as much as possible. There are so many ways in which it can be affected, and I'd never willingly be put in the situation where someone had direct voice into it.
Learning techniques to master and control your subconcious - rather than the other way round - is in my book a far better alternative as it is both empowering and self perpetuating. (and ultimately cheaper)
Just my view.
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I am the walrus!.... er, no hang on....
A fair dinkum laughing Hyena!