Of couse. I used to be able to suck myself off when I was younger and thinner. It was a highly erotic experience and I loved being able to do it. To be sure there are eaier ways to get yourself off, but to be able to get your own penis into your mouth is like a religeous experience! Its totally making love to yourself.
I have never had any interest in another cock. I love mine, and its just advanced masturbation.