Mansplaining hell

Hi! Needed a rant and thought this might be the place for it... I'm hopefully soon going to start ttc with a second known donor, (the first lives in Canada, I'm in the UK, so not many opportunities!) And I'm struggling to keep my cool in the face of just phenomenal levels of arrogance and mansplaining.

The guy seems harmless, has experience donating to a small number of diverse people, has the tests done I want him to, has a nice face, but dear lord if he tells me one more fact about my own uterus so help me I may lose my shit.

I'm so annoyed that now that I've taken my decision to go ahead with parenthood without a man, I still have to put up with men trying to tell me what to do with my own fucking body! I'd appreciate it if he offered some tips he's got from other uterus owners he's helped with a shred of humility behind it but you'd honestly think he'd invented the concept of conceiving the way he spouts it.

Have you had similar experiences and how did you stop yourself combusting?

Thank you!!!