That’s not a bad idea! Every time someone asks me I sorta panic and hope they don’t know the cologne I just said haha. Very smooth!
Hey that could be great for a kiss close idea! You say it’s a secret, and don’t want other guys knowing your secret or "stealing your sexy scent (lol that’s a great one sinister sam), then say you’ll whisper it to her, lean in and kiss…she’ll forget about the question immediately!
Sounds like pick up artistry at its finest… I’m a little to shy to try that one haha, but Mr. Feel Good certainly has certainly given me a good line to use from now on. 
I don’t use cover scents at all. The pheromone mixes I use are complex enough that the natural scent of the pheromones forms a very nice “cologne” by itself.