Canada’s chief public health officer has urged couples to wear masks during sex to prevent the spread of the new coronavirus.“Sex can be complicated in the time of Covid-19, especially for those without an intimate partner in their household or whose sexual partner is at higher risk for Covid-19,” Theresa Tam said in a statement.“The lowest risk sexual activity during Covid-19 involves yourself alone,” she added.But those having sex with a partner who is at risk or from outside their household…