Making ones self almost ejaculate but completely stopping just before you actually climax. Wait 20-30 seconds and continue. Perform this process 4-12 times for maximum pleasure and then when one finally ejaculates, the nut has an incredible mass.
This process is usually performed during wanking but can be adapted in sexual inter course.
Living on the edge means living a dangerous and/or unusual everyday life. People who live on the edge are very frequently exposed to phisical, psycological, economical, lawful or other kinds of dangers.
Examples for people who live on the edge:
Extreme-sportsmen, gamblers, policemen, thiefs, human-rights-activists, rappers, etc.
-My friend John is living on the edge.
-Oh yeah? He is a gambler or something?
-No, he cleans windows of high office buildings.