Why am I always hungry after working out?

So I'm 18 years old, and I've pretty much always been that one really skinny dude with a really fast metabolism. I started working out about a month ago, and lately it seems I just can't stop eating. I can't go more than an hour without eating something. I'm beginning to wonder if it's worth it to work out if it means eating this damn much. I have to say though, it has made me a much less picky eater, which is definitely a good thing. Maybe I should just go for stamina rather than strength, I'd probably make a better runner then a body-builder.

This is my workout routine so far, in case it's relevant:
Dumbbell Curls 3x10
Sit-ups 3x30
Lunges 3x10
half push-ups 3x10
I workout in the mornings of Monday, Wednesday, and Friday. As soon as I build up the strength to do full push-ups, I will. Also I lift 15 lb Dumbbells.

I also have a few protein shakes, as well as a tub of Protein powder, which I usually drink after working out.

Any advice would be appreciated.

Alot of teens that post here have trouble eating enough, you have the opposite lol. It's all good though, aslong as you're not gaining weight too fast.

^^ This.

I was one of those that had a problem (and still kinda do) with eating a lot, so its defo not bad bro!. Who says you cant run and lift?
Whilst eating this high amount you are able to gain muscle though if you wanted. And as you're on the bodybuilding forum i think i know which way you'll be persuaded lol.
If i was in your position id find a good routine and make sure you're eating a good diet and go for building some muscle!

You should work on getting your strength.

Use the Starting Strength, with your desire to eat, you should shoot up without a problem

I used to eat not "that" much. Once I started lifting; my appetite went up as well, but some days, I still got to force myself to eat more.