Perhaps boys didn’t hear this as often as girls, but ladies know what I’m talking about. Or anyone with a sister. Every time I would rush out the door after a shower as a teenager my Mom would yell “You’re gonna catch a cold!” However, many researchers such as Dr. Pritish Tosh have explained that having wet hair doesn’t increase your chances of contracting a cold or flu virus because you would need “to actually be exposed to an infectious agent”.