I am the first person to accept that I'm quite sensitive to misogyny and am pretty sick of in being ingrained in society.
Honestly though, I'm not sure this comment falls within that category.
I think the fact that Bonnie Blue has become well-known within the mainstream changes everything. As PP have pointed out, there has been a documentary about her, multiple newspaper reports, and she's even been on the bloody news. The Guardian describes her as a "tabloid favourite" and I think that's accurate. She's like an X-rated version of the page 3 girls of the past who achieved huge fame and celebrity status, just for getting undressed - Sam Fox, Linda Lusardi et al.
And unfortunately, what Bonnie Blue is famous for - and is weirdly proud of - is the fact that she had sex with 1000 men in one day, with them queuing up to have their turn.
The fact that she's so notorious and has become this well-known mainstream celebrity means that this man was essentially just referring to a news story.
It was factual - there was a very long queue of men waiting for Bonnie Blue. Referencing that isn't misogynistic.
If he'd made an unpleasant comment about the state of BB's vagina (sorry) then that would be a misogynistic reference.
Misogyny is defined as contempt for or ingrained dislike of women. I just don't see how referencing the long queue of men - a factual thing - displays a hatred of women, or contempt for them.
Plenty of men and women might feel uncomfortable with a reference to Bonnie Blue. That's understandable. Offensive doesn't automatically mean misogynistic though.
I think you could easily argue that it's not a socially acceptable reference to make because we know what the men were queuing up for. You don't allude to sex in polite company, nor in a work setting.
I'd say it was a throwaway, clumsy comment that wasn't really professional - but I don't see how it meets the threshold for sexism or misogyny.
The bloke does sound like a giant twat though with his emoji response. It doesn't even make sense. Obviously a massive dickhead.
Other blokes messaging you to express shock at the comment feels a bit ridiculous. Weirdly, that feels more misogynistic than the original comment. There was a tasteless comment - you called it out. Job done. Why do they need to message you about it privately? Do they think you're some kind of fragile little flower? I think that would actually annoy me more than the crass comment.