Yeah, I don't see the issue there. Some people buy a mattress, don't like it, and then buy another different mattress. Some people like the mattress they bought for their kid so much they buy a similar one for themselves. Some people like the mattress they bought for their rental house so they buy one for their primary residence. And so on. Sure, it might not be super likely that someone buys multiple mattresses in a short period of time, but if someone has mattress buying on the brain, it is possible.