Slowly strangled while looking in the mirror.
UPDATED INFO
It was NOT solo autoerotic death. Another young man, his 24 year old gay lover was also taking part in it. He was supposed to act as a safety spotter. But in fact planned to cause the death of his partner. On purpose was encouraging him to go further and hand masturbating him, so he would want to continue.
And then when his partner had finally passed out, he just stepped aside and did nothing to help. Just watched him convulsing dying while passed out. Then called police to repost accidental death and that he already had found him like that when he came home.
But cops got suspicious and with further interrogation he admitted of being a participant and then doing nothing. Because he claimed it was done as self-defense. Since his partner was treating him as sex slave and raping him rough. Sometimes tied up. And threatening to reveal certain serious legal violation details from his past that would cause him to lose his government job. That is why he could not just leave him.
