The translation here is so mangled on one key panel that I'm really having to guess what was meant.
My best guess here is:
The whole premise here is kind of amusing, but pretty absurd:
- Every non complete newbie knows that char sex may not be the same as IRL sex.
- Is MC using female speech for his character in the game? (Doesn't apply in English, but does apply in Japanese.) Which would be strenuous and embarrassing for a guy unless he's actually into that.
- And what sort of newbidiots are thinking of a romantic relationship in a game -- without at least doing a sex check.