Conflicted, your posts makes a lot of sense and makes very interesting reading.
I'm interested to hear more about your "Sexual addiction" and how/when did it started and how do you deal with it.
So what you are saying is when one found true romantic/sexual partner one sexual addiction would be gone correct?.
		
		
	 
No. Plenty of sex addicts married or in long-term relationships. They do indeed love who they are with, but are still addicted to porn and acting out.
Relationship problems are of coursed caused by it. Some men are so fixated on porn, they can't appreciate or get into being romantic. After viewing hours, upon hours of pics and videos of ultra sexy women, "taboo" videos...their wives or partners could just seem boring. Sexual addiction is caused by all kinds of reasons, often due related to relationships with other people, so there can be intimacy problems there.
It could complicate matter even more, if such a man is caught by his wife/girlfriend in gay chat rooms, looking at gay porn or even acting out by having anonymous sex with other guys. It could appear he's a closet case, but in reality he could just be a sex addict who's addiction has escalated to that.
These people are not driven by a healthy sexual appetite or are just "horny" every now and then, but by a compulsion. They use porn/sexual acting out as a coping, even defense mechanism. They're addicted to the "high" they feel when engaging in sexual behavior and the orgasm. It's a moment of escapism for them. When they come down from their high (after they cum), their true self and core values take over and reality sets in...which could explain the "cum and goers". 
A lot of people would say the true reality is when they're acting out with the same sex and that their true sexuality comes out, but that's not true. Reality is when they got their fix and now have to deal with the guilt and shame of acting out in a way that contradicts their true self and goes against their core values. Which of course, only creates more conflict and anxiety, which of course could and often does leads to more acting out for the sex addict. 
My own definition of a "closet case" is a man who KNOWS he is gay, but keeps it secret. He WANTS to be an out and proud gay man, but chooses not to. Maybe for religious reasons, career reasons. Maybe because he married before he came out to himself and doesn't want to ruin his family life.
The whole slew of straight identified guys who confess to being sexual with other men, but also say they're turned off, even disgusted by "kissing" and being romantic with other males. Could you really call them closet cases or insist they are not straight? These men aren't "denying" anything.
Engaging in sex is like being in a trance for them. They give up everything for that "high".
Speaking for myself, I came from a turmoil filled household with lots of screaming and yelling. I was insecure about my looks ever since I overheard a female classmate say I was ugly. This gave me an early sense of "not being wanted" by the opposite sex. My dad was always financially supportive and generous, but we always had a weird, rocky relationship. He was always too busy with his own problems, for me to be able to talk to him about mine and he was overtly critical of me.
Anyway, even at 13/14 I KNEW I was using porn as a way to shut the outside world out. In that sense, I used it like a drug. Like any drug...you require higher, "stronger" doses to achieve an effect. 
But for your info, I've only had ONE encounter with another male. A glory hole blowjob (in "real life").  It was totally circumstantial and situational. Had I not lived in a city with porn shops like that, walking past them every day...I would never be able to say I ever did such a thing. I regret it, because it did open a can of worms. I believe it was just an extension of my obsession with sex and a need to behavior in a "dirty" way..not because I was lusting for another male. I felt worthless in the eyes of women, unattractive and even angry towards them..so I had a "fuck it" mentality. I do get urges to do it again, but I don't. Not because I am repressing it, but because I know it will lead to no long term sense of relief. It will only confuse and add more regret...also because, I have a sense that in "real life"...it might be VERY different than in my head or in porn.
It's cheap, meaningless and sleazy and totally goes against who I am to act out sexually with (most likely a married) man from craigslist. Yet, I no desire nor could I ever actually MEET a guy, get to know him and do anything sexual. So it's obviously not for me. I have no interest in that at all nor would I ever want a relationship with another male in that way.
I've started with gay, bi, tranny porn early on, or at least had a "little" interest in it..before I got the net. At first it was curiosity with a little repulsion...
But I always felt 100% straight....never made any connection between my romantic/sexual attraction in "real" life, to what I'd masturbate to in fantasy and porn. I believe we ALL have our innate, core sexual orientation. Straight, bi or gay.....but then many people have interests in certain acts, behaviors, fantasies, porn, etc..that are separate from that.
I've also thought the reason a lot of these guys do it, is because they are actually very much heterosexual. We have the most emotional baggage with the sex we're naturally drawn to, desire and feel for. Thus making sex complicated at times and somewhat stressful. For these guys, there is no emotional feelings when being sexual with other guys. The man is nothing but a prop, a human blowup doll.