I think that Derby-Tom1976 who writes above is correct. I wanted to enlarge the concept that he starts out with and so what is below is a free-form improvisation to broaden his specific theme to more general aspects of life as well. Thanks Tom.
"......humiliation' is a form of reverse psychology, that works at quite a deep level.
Essentially, no man really wants to be told he is 'inadequate', but in the context of sexuality, such statements can - for certain individuals - be a turn on, because they produce a less than fully conscious desire to 'prove oneself', by producing an erection; i.e. the humiliation produces a surge of sex hormones because the instinctive response is to over-power the humiliator.[this might have something to do with guys addicted to bookstores; e.g., the majority will pass them by if their open booths...so the erection inflates their advertisement and makes them more desirable thereby over-coming their humiliaTOR.] But in the context of other humiliation role play, the turn on is simply enjoyed for its own sake. [We also get into this with the "bad" student...the negative attention seekers....because they can't get any attention through positive behaviors]
If this sounds far-fetched, then consider the fact that in the real world, many fights start because one individual has humiliated another, and indeed, bullies that go around wanting to start fights on drunken nights out: often find their victims by way of verbal insults first - if their attempts to offend and humiliate produce a 'rise' in their prey: then they have found an opponent.
I think much self-induced humiliation works in a similar way - the humiliation produces a hormonal 'rise' thereby blocking or 'numbing out' the individuals tedium with his own self-perceived 'war-zone'.
Like anything to do with addiction>>>>>the amount needs constantly to be raised: more pills, more chance-taking, etc.
It's worth remembering it's more to do with deep psychology - that humiliation can produce a surge in aggression/sex hormones/ whatever --to accomplish the REAL GOAL:
1. to block out;
2. to DISPLACE tedium, frustration, etc:
whatever the body perceives in it's own way to be painful.
If one says: but, humiliation is painful, why would anyone want pain: the answer is in the old joke: have a snake bite your left foot so that you don't feel the pain of the spider bite in your right foot !
These are --sometimes-- maladaptive responses to BLOCK out the REAL issues....including>>>> the frustrated search for meaning and beauty.
Like anything in life...we need to be careful.