Matano Okoshiwo - Vol. 2 Ch. 8.5

[MangaDex]

 

[Dantrig]

I don't know about the original joke but it could just be an attempt to help the manager. Not every line is a zinger.

 

[ImperiumZero]

I can teach her how children are made :3

 

[ma_ko]

Holy shit that's some high level joke

 

[scripted]

Hahahaha thank you team for that hot and intirguing fact

 

[MangaAddict69]

Thank you for the chapter @Phymiath

 

[00nowhereman]

high end level of joke

you must have high end level of understanding to understand

 

[Yamibi]

"*Greenhouse effect" *thumbus up* *bloody nose*

 

[Hawkstorm125]

The joke is not really a joke it's just referencing that the manager grew up like a plant in a greenhouse, so sheltered. Basically it just means that she doesn't have much knowledge of the world or in this case much knowledge on relationships between men and women.