He'll remember eventually, but only once it's actually relevant. Mako's rambling doesn't qualify unfortunately.

But ultimately her question just makes him inwardly scoff at the idea. He'd insisted before that the blood of women tasted better than men's, but in the end, blood was blood. The only real exception was the blood of Joestars...now there was some tasty blood. The idea that anybody else's could taste better than the rest was ludicrous.

...even as unreasonable as it would be to expect anyone else to know that. But he decides not to be honest.

"Quite tasty. The blood of a woman tastes much better than that of a man's, but even more so if the woman in question is so lively like yourself."