Subscribe | UPI Odd Newsletter Subscribe ZURICH, Switzerland, Oct. 8 (UPI) -- A Swiss Google engineer said he has designed an online sobriety test aimed at preventing people from sending e-mail while drunk. Jon Perlow said the feature, which requires users to solve five simple math questions in 60 seconds, was inspired by his own intoxicated misuse of e-mail, the New York Post reported Wednesday. Advertisement "Sometimes, I send messages I shouldn't," Perlow wrote to the newspaper. "Like … the time I sent that late-night e-mail to my ex-girlfriend that we should get back together." E-mail etiquette experts said Perlow's idea is a good one but they don't believe many users would be willing to test themselves. "The only people I could see using this are those who have gotten into actual trouble doing this," Cherie Kerr, founder of ExecuProv, a California consulting firm specializing in corporate culture and e-mail manners, told the Post.