How do you erect your penis during sex?

When you are sexually attracted to someone you are about to have sex with your penis will automatically erect ready for it. If it does not then you may have an erectile dysfunction or be very nervous. The first time a male has sexual intercourse he may find he is nervous and not erect or he may find he ejaculates very quickly (Premature ejaculation). The thing is not to sleep with lots of different partners. Have a loving relationship with one partner and you should not have erection problems.