"thin" meaning way too much choice and they are almost all entirely oblivious to your advances?

yes

ordinary stuff like reproduction and perpetuation of the species are marginal concerns to those with big engineering problems on their mind all the time 

 I meant that there aren't many other girls there. 50 dudes and you.
No problem getting laid, with those stats. 😂

"She's the cutest girl in the machine room." 

 well, i can see both sides of this and i can assure you that being oblivious to advances can be a thing too 

 😂