Forgot my toothbrush

li
Okay so this weekend my boyfriend and I are staying at his parents house. I don't know about you but literally everytime I pack I go over in my head a million times that I got everything. I ALWAYS forget one thing, it never fails. This time it was my toothbrush and I cried (whined, just so you don't misinterpret that lmao) to my boyfriend about it saying we needed to make a trip to the dollar store so I can buy a toothbrush and he was like "You can just use mine" 
My face when he said that. What even, boyfriend. 
I said.. That's really disgusting and he was like how??? We kiss and make out and have sex and I'm like yeah.. But we don't clean the plaque off each other's  teeth with our mouths an he's like oh come on my ex girlfriends have used my tooth brush and I'm like DUDE THATS EVEN NASTIER OMFG. he thinks I'm being a spaz. Is it really a normal thing to use your SOs toothbrush or is just myself that's finds that way too gross.