Most men experience a refractory period immediately following an orgasm, during which time they are unable to achieve another erection, and a longer period again before they are capable of achieving another ejaculation. The duration of the refractory period varies considerably, even for a given individual. Age affects the recovery time, with younger men typically recovering faster than older men.
Stress can also be a contributing factor to both erectile function and premature ejaculation. If there have been any major changes in your life style this could be a factor.
Also worrying about this won't help. It's a catch-22 situation. Try some relaxation techniques; loads available to download on the internet and listen to. Try a yoga class or going for a run.
Also talk to your partner about this. If your stressed, she will be too. Also ask her to try and help you through it. It's something both of you can have fun getting over.
If she is unhappy at you for not being able to maintain intercourse; try extended foreplay and oral sex (you to her) and gradually re-introduce intercourse. When the time is right your penis will let you know.
all guys go through something like this at one point in their life. You're not 16 anymore, and your penis isn't either. I think the wart has absolutely nothing to do with what you're experiencing now. You've been in this relationship for a year, you must have very strong feelings for her. Perhaps your feelings for her are stronger than you realize, and you feel such a connection that makes you ejaculate faster than you did when you two were just getting to know each other.
You could get her close to her climax BEFORE you engage in intercourse. Foreplay is much appreciated by us girls. Also, you could try using some lubricant so there's less feeling, or try using a condom for her sake... so you can last a little longer for her to enjoy it. Good luck!
You're getting older and men stop being able to "recover" as quickly when they reach their mid-late twenties. This is normal. Just make the "first" round worthwhile for both of you and stop worrying.