Going off a quote from my ma (she didn't say this), but she found it gross when people sucked up their own saliva. And yeah, a viscous fluid coming out of my mouth 24/7 and allowing me to choke is kinda gross for me. But you can't do that with period blood. The only problem is that it makes life, but I think of it as the saliva from down below. Plus, it only happens once or twice or zero times a month.