<p>I think there’s still some confusion. </p>
<p>Once you have an undergrad degree, you don’t “need” any more. And most schools won’t let you get any more. One to a customer ;).</p>
<p>I also don’t know why you’d want any more majors. That doesn’t really accomplish anything.</p>
<p>Now… on to graduate school. If you want to go to graduate school in a field that requires certain undergrad preparation… your first option is to get that preparation before you graduate. This does not necessarily mean another major, just proper pre-requisite coursework for the graduate degree.</p>
<p>If you leave undergraduate with your degree, then choose a graduate field for which you do not have all the prepartion you need… Go To Options 1 and 2 in my post above. Can you take undergrad courses at your grad school before starting the grad courses? Maybe, maybe not. You will need to determine this in consultation with admissions people at whatever graduate program you apply to.</p>