Bit harsh on this chap, guys? At the same time no need for all this cussing, new dude, calm it down.
The macho attitude is obviously that to be "Alpha Male ++ Super Deluxe Captain Turgid MegaMan MAINTAIN FRAME" you have to immediately plough a woman the minute you're slightly hard on a second date or something.
I personally find that in reality it varies a lot. Sometimes you'll want to do it but you can't (she doesn't want to, she's on her period or unforeseen stuff like STIs). Other times you might feel aroused physically but you're just not feeling it.
You don't need to f*** every time you feel physically aroused to be heterosexual. Maybe you just didn't feel 100% comfortable with that girl, unless you are exploding with confidence you are not going to neccessarily want to f*** someone who you're not relaxed and comfortable with.
Also everyone has various degrees of romance/comfort they need before they progress to sex. Varies on the person and their experience level.
Marmel for example has said he's comfortable with heavy physical flirting on a first date, because he's experienced and has a lot of confidence. Personally I'm less experienced and as a result I wouldn't feel comfortable f***ing unless I actually felt some significant trust in a girl.
So it's often a lot more complicated than just getting a boner and charging in while bugles play, just play it by ear and how you feel with each girl and stop judging yourself.