Just because there is mutial respect doesn't mean that banter is banned.
The comment above I certainly wouldn't have taken offense to and I doudt any of my female collegues would either, in fact if think the majority of them would agree that under car bonnets are for boys. I certainly don't see them hold back using playing with hair or fluttering of eyes when thier car batteries are dead after being a way for a week. And engineers are a sucker for it.
And an odd comment to an Avionics engineer asking where his A&P engineer minder is to drill out all the rounded screw heads is always taken in the manner it was intended.
PS Do they not train avionics engineers to use the correct screw driver for the job? Or is it as I presume BnQ don't sell multi head screw drivers with aircraft fittings.