I guess default perception of burden of proof, prior to sufficient learning on the topic, has a lot to do with life experience, and I'm not going to spend my Saturday night looking up citations for someone who is wrong on the Internet, especially when they could easily find them themselves if they were actually interested, but I am certain if you are able to discuss it with woman friends who trust you, in any of a wide variety of professional fields, they will be able to tell you enough experiences they've had to, at the least, shift your perceived burden of proof.