Is it normal to ejaculate fast?

It depends: Most couples prefer for the man to last for a while, and learn to time and control things for mutual enjoyment. If a man wants to last longer but can't, a condom or a dab of anesthetic on the glans may be all that it takes. A physician may write for a low dose of a ssri, or the couple can learn the squeeze technique and practice together.

Difficult question: Ejaculation time varies man to man and event to event. Depends on energy level, stimulation pace, time between events, drugs/meds on board, fatigue, health, etc. Broad range is about 2-15 minutes, with tighter average being 4-6 minutes. Best to do your own research...be safe!