Is it normal to cum in your underpants?

I do it although sometimes I do wonder about others picking up the smell of cum

you are dirty use some towels instead you little freakazoid!

It's a great feeling but messy in the end! The best wsy of doing this is using sex toys (hands free).

I always wore white briefs since I was little. When I started to jerk off, I found that it felt good to use the back part of a pair of briefs to wrap around my dick and stroke it. I'd keep stroking and blow in my briefs. It made yellow stains. My mom knew what the stains were, but never said anything to me. To this day, it's my favorite way to get off.

if your too embarrassed either flush them or do your own laundry.

I do that too.