I've got a friend that's the same way, put a 4 foot rollling sea out in front of my boat and he will be begging to return to the dock within 30 minutes. Luckily for him, it's only a matter of miles and I'm more than happy to bring him back in.
I've never been sea sick and that even includes weathering a monster off Cape Hatteras in 60+ foot seas, while trying to grap a couple hours sleep in a hanging hammock under deck on a 52 foot catch. Sorry for that image #^&#^&#^&#^&#^&#^&, that in and of itself might have given you a touch of green
.
My friend never had a cure, and I'm not sure what the modern solution is...if any. I personally get a thrill out of the rough stuff, ask anyone that's been in my boat
, I like live it on the edge.