I'm 16, is it possible i have erectile dysfunction?

Erectile Dysfunction is not necessarily physical brotha. You need to understand that if you can get hard in other situations, but not during intercourse, then it IS E.D. Temporary or not, it is still E.D (psychological form).

I think it is performance anxiety. The first time you have sex with someone you might "mess things up," ejaculate too early, get nervous and not stay hard, ect ect. The first time unfortunately sets the bar. Each time you have sex with her after that, you might be thinking "oh no, i must do better, i must do better !" And now you are in an unhealthy mindset that will only snowball unless you work really really hard to fix it.

A penis' rigidity and erection strength comes from your brain. Your brain tells it to get hard and then some physical things happen with blood flow. If you are not relaxed, your mind is not going to be willing to send those signals to the penis.

You are experiencing performance anxiety. Slow down a bit and see what happens.

you arent old enough to have sex and slow down with trying in the vagina and butt altogether. and dont get caught with her pleasuring you.

Wow, dude.. this is awkward. Try sticking it in her butt while she wears a football helmet. If you maintain an erection.. your gay.