scent retention

I have what is perhaps an unusual question regarding the smell of essential oils as my soap cures. I cure my soaps on a bakers rack in my office in my house and generally make a couple batches (two dozen bars) every month or so and have never found the scent of the curing soap to be an issue...

I'm relatively new to soapmaking, and I've been frustrated because I can't seem to make almost any FO stick. The other day, I was watching a Royalty Soaps video, and Katie said that so and so recipe had a "great scent retention". And it got me thinking. Is that a thing? And, if it is, which...