Are females known to scent?

[Bogertophis]

That's not necessarily true, all my BPs are in the same room and in racks inches away from each other and none of my breeder females exhibit this behavior. It never hurts to pair them early though!

How many do you have? Maybe there's just too many scents "competing" with each other for them to sort out? I dunno... Or maybe your air circulates in ways that doesn't facilitate this?

When I've bred snakes (never BPs) they appeared to respond to scent quite a bit- in fact, that's how I gauged they were ready to put together.