Sometimes, you can't ejaculate when you want to. It might be because you're used to masturbating or having sex in a certain way. Maybe you're with a new partner and you need time to get used to being with that person. Drugs and alcohol can also make it harder for a guy to ejaculate.

Try talking to your partner about what feels good and remember that ejaculation shouldn’t be the ultimate goal of having sex; it should be about overall pleasure and bonding with your partner. That usually helps. If you're unable to ejaculate more than half of the time, talk to a doctor or health care professional.