I’m in my fifth (hopefully last) year of undergrad psych studies, and regularly have things mansplained to me. There’s a twist though! I’m a guy.
I look very androgynous (and apparently sound it, to a degree), to the point that people go out of their way to ask (what they think are subtly phrased) questions designed to reveal my gender. Of course, I find creative ways to avoid revealing that information, because it’s really kind of annoying when people think I won’t notice the actual question. Long story short, they almost always end up going by hair length.
Group projects are always entertaining. If I ask a male student a question, and have short hair at the time, I’m given the answer.
If I have long hair at the time, some guys helpfully summarize basic first-year psych material (for bonus points, they might use the tone used to reassure small children that they won’t go down the drain with the bathwater). If I’m lucky, they even remember my question by the time they’re done answering. However, this only happens if they haven’t noticed the masculine spelling of my name, or seen me walk into/out of a washroom.