Common error. No worries. Like you said. I have cousins aplenty roaming around. Also very understandable. I'd rather not think about how my own parents got together either.
Trust me that particular path leads to madness.
Maybe it's more a sweaty dollar bill scent then...or dirty high end gym socks? Like the brand name socks that only really really well to do people wear sweaty sock smell?
It has suddenly occurred to me that talking about one my cousin's socks...is weird. Ah well. I've had stranger conversations.