no, the condom hold the cum on the outside of your penis. Never hold the cum inside you're penis. Let it out and clean up the mess afterwards if you have to. Use a tissue to catch the cum as it comes out.

lulalilo,
No when you cum the it will spurt out of your penis but the condom will keep it inside the condom itself, typically there is a litte bit of a bump at the tip as a resevoir to hold your cum. And, yes, when you masturbate it would be best to catch it somewhere, either in a tissue or whatever to avoid the sticky mess.

Wendy

So when masturbating I should hold a tissue to somehow catch it? Because I am 15 and can't be leaving messes everywhere.

lulailo,
Yes definitely have something to catch your cum when you ejaculate. It does get very messy.

Wendy ;0

Thanks. I'm 15 and I've never really masturbated before. Does cum usually shoot out or does it just drip? In porn it seems to always shoot out, wouldn't that be kinda hard to catch?

lulalilo,
You will have to see what happens for you because everyone is different. Your cum may shoot out strongly or may dribble, but you will have to see. You have to make sure that when you ejaculate that you aim your penis into the tissue or cup or whatever you use to catch your cum. Again, this is something you will have to learn and adjust to as you masturbate.

Wendy