Pro-tip- Girls actually don't like a large volume of cum. It's messy and gets in their hair and eyes. Only in porn do they love it. Because they get paid and are actors. The normal volume is 1.25 to 5ml. That is still something most women don't want to deal with.
Cum is a fun visual in porn but in real life it's a messy mess. So don't worry about increasing your volume.
I'd be pounding Riahana all day all night. But I think she would end up pounding me. So Cara just to be safe.