"I think that Vanessa's 'blow outs' have altered your neurons. You can't leverage with sex all the time, and you shouldn't hold on to favors that much." Gustav countered.
In any normal occasion he'd be happy to smack the daylights out of such an attractive woman, but this slight arousal barely felt natural. Behind any actual sex, he wanted a steamy setting, and this wasn't quite it.
"You do owe me though," Andena insisted.
Earlier on in life he wouldn't even debate this, but his recent increase in toned brain-mass, didn't really let him to get attracted towards casual sex. He acknowledged these changes in perspective really well, and knew that his current higher intelligence forced him to raise some standards!
He wanted to bathe any desires into a thicker, plentiful background. For both arousal's sake, as well as neural stimulation's sake, he decided to reject this offer in exchange for a better future experience; He had hopes.