There are so many sexuality-related topics relevant to this November's election, such as marriage equality (i.e., gay marriage), reproductive rights (i.e., abortion), comprehensive sex education, health insurance, HIV/AIDS prevention.
Are the rights around these topics important to you? If yes, please make sure you are registered to vote. Depending on your location in the country, the deadline to register may have passed, but some areas are still open. I think this YouTube video called "5 Friends Vote" by a bunch of Hollywood stars is a poignant and cleverly entertaining way to encourage folks to register to vote, and give them the online link to find out how!
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