She lives alone in a rented house, why do she have 3 toothbrushes in the toilet?

It is advisable to ask her first, and if you are still suspicious after listening to her, then you will use various excuses (sooner or later) to go to her residence to seek answers. I'm sure you'll get the answer in the near future!

But a word of caution: if she's your girlfriend or wife, you can do that, and if not, don't snoop on other people's privacy!

Maybe it's an old one and it's used to brush something else.

When we were in college, we used an old toothbrush to brush sandals and stuff, as well as a comb, and a toothbrush to clean the edges and corners of the sink

Sometimes I buy a new toothpaste before I run out, and I open it if I want to try it, and cheap toothpaste can also be used to brush things, wipe the mirror with toothpaste, or something.

Are you reading too much detective fiction ......

I live alone, but I don't know how many bottles I have on the sink with five toothbrushes, two mouthwash cups, and shampoo and facial cleanser.

If in doubt, ask her, and if you don't believe what she says, don't stay with her.

I also live alone, I also have two dental tanks, 4 or 5 toothbrushes

Hehe, friends who often come to live together, just like you.

Maybe someone has been staying at his house recently, hehe.

Don't doubt that this is not good for you.

It is very likely that a friend will come to stay, and there will be a possibility.

Are they all in one tooth tank? If not, don't worry.

You can ask her.

I don't think it's okay in general.

Didn't she use the old one?