IF HE HAD BEEN THE MAIN CHARACTER IT WOULD HAVE BEEN CALLED FIFTH SENSE (DUDE CONRAD I'M SORRY YUKO THOUGHT OF IT DDD: DON'T BEAT MEEEE)
It's well-documented around here that Conrad actually doesn't have any sense of smell, but it's one of those things that we tend to forget. In a lot of ways it's pretty similar to how forgetful I am about Hawk and Ramadan ... except in this case everyone forgets, so maybe I am just being a jerk to Hawk.
Conrad does have days when he can sometimes smell things, but it's tough to say what triggers it.
And before anyone asks, he can taste things just fine! It's quite the conundrum. CONRAD IS A MAN OF MYSTERY