When one gay person begins to explain something pertaining to the gay community, via mansplaining method, and the recipient is well aware the topic they are trying to explain.
When someone not from the lgbtq community tries to explain why gay people have rights, or how they are, or anything coming from a non queer person about the queer experience.
When someone of an older generation (typically a Baby Boomer) condescendingly explains why you are doing something wrong, even though they lack the shared experiencenecessary to equate theirs with yours.