Please, for the love of Pete, don't hug your grandma right now. At least, that was the message The Tonight Show Starring Jimmy Fallon host Jimmy Fallon and return guest Adam Sandler wanted to share with the world through their new quarantine-focused song, "Don't Touch Grandma." Now, Fallon and Sandler aren't hating on your grandma. This new —and admittedly pretty dang catchy — song isn't about shunning our elders just for the fun of it. No, this is about keeping our beloved grandmas (and grandpas!) safe during the global coronavirus pandemic because they are one key …