Why do people buy sex dolls

Why do men like sex dolls? Why do they spend thousands of dollars on lifelike silicone dolls instead of pursuing real women?
Below are quotes from real sex doll owners on why they bought a sex doll.

"I just got tired of walking into an empty house after a stressful day at work. All I have to do is see my doll smiling in the corner and know everything is going to be ok. I know my house is still empty but at least with my dolls here it does not feel empty."

"For me, I'm just tired of being alone. Already been there my whole life, don't want to live out the rest of my life that way too. I figure a fake girl is better than no girl at all. Aside from that, any girl I could realistically be with wouldn't look nearly as good as some of the dolls folks are selling out there."

"I was married for 25 years, most of the last ten years were unhappy, now that I'm single again the last thing I want is a (real) relationship. Dolls don't complain, there always there,never have a headache. dolls win."

"I started with a latex balloon fetish in my youth. It expanded into inflatable dolls then silicone dolls.
The dolls are not a substitute for a relationship, they are just for a kind off antasy." 

"To capture the beauty of female expression in photographs. I have always admired what some have done with their photography of them."

"I just got tired of being alone. Most of the women I went out with got pissed when race season got here and I went to work on race cars on most weekends. And I don't want all the head games that real women bring with them."

I think its all in the fantasy, I was always into anime and i guess it grew from their. most my dolls are Asian or have the anime look to them." 

"I wanted a companion. That I can hug in to sleep. Or not feel lonely when I play computer games. I find her too cute.The elf model that I have bought."

"I have always wanted some type of sex doll ever since I was a kid. I use to buy Barbie dolls and then make them anatomically correct. I have a collection now. Went through a phase of inflatables but always desired something more real."

Top 3 Reasons:

For a better sex life. 

For companionship, and to fight loneliness. 

To satisfy a specific doll fetish.