It's really not the same for everyone. There's people that can just cut you off and not give a rat's ass about anything regardless of how intimate your relationship was let alone just friends with benefits. And there's other people that let you in to their heart over the smallest matters and be hurt even when the slightest things change even just as text buddies let alone while sleeping together. Therefore, it kind of is hard to come up with a general statement about everyone because not everybody has the same cycle of hormones.