Sometimes straight people seem to completely forget that not everyone is actually straight. These moments of erasure can happen on the small scale (Aunt Pam and her "roommate") or on academic levels. Here are some examples when ended up straight people looking pretty foolish by not taking off their cultural blinders. You can find more examples like this at r/sapphoandherfriend.
1. Only FairPhoto: u/northlakes20 / Reddit
3. Just Checking Out The GrassPhoto: u/skinnyskull04 / Reddit
4. Ms. Or Mrs.?
5. The Time Before Lesbians
6. It's One Or The OtherPhoto: u/NickThatNick / Reddit