It 'ought not' ('to') make any difference. [=(more commonly) it shouldn't make any difference]
Children 'ought not' [='should not'] run near the pool.
If my math is correct, the result 'ought to' be zero.
(..) That's true. - It makes you feel special when you're there. - Mmm. that you love, you take 'em to the opera. Yeah, I ought to bring my girlfriend. That sounds romantic. - What? You have a girlfriend? - Yeah. Leonard, you didn't tell me (..)2008 Two Lovers