I think alexsandra going overtly sexy into hideaway didn't do it for him and he felt pressured and turned off
But she looked overtly sexy on the date and he seemed to like that.
Maybe heterosexual sex in general feels like a pressure to him rather than enjoyment.
I know a lot of men you could call an intellectual type (not that Alex is one) And while as a long term partner they would look for someone on their wavelength, it doesn't mean they wouldn't find a woman who wasn't their type attractive if they happened to find themselves in bed with them.