Hi, I am 14 and I have been in a pretty serious relationship for the past year and it wasn't until about 2 months ago that my girlfriend and I had sex for the first time. We used proper protection such as spermicidal lubricantes and a condom and I got to the feeling of cumming pretty quicly. Is this normal? Are there anyways I can hold it back and last longer? How long do people averagely last there first time?