Semen Suicide
When you jack off in the shower.
"Sorry I took so long in the shower, I just committed semen suicide."
Semenal Suicide
Killing yourself by drowning in your own semen.
"He was found face down in a pool of his own semen. I wonder if they'll put Semenal Suicide for cause of death in the paper."
Suicidal Semen Fastball
Post intercourse, the man ejaculates into his hand, then winds up the Suicidal Semen Fastball firing it at his partner as fast and hard as he can, flinging the semen all across his partner's body.
" My boyfriend launched his Suicidal Semen Fastball at me, plastering semen all across my face. There were no survivors."