Can a cop pull you over walking home asking why you are out so late?

Sure they can. It happened to me a few years ago.

I told them I was in the office. They asked if I'd been drinking. I told them I was just too tired to park properly and wanted to go to bed. They kept asking dumb questions about my job (I was so tired I’m pretty sure I was really confusing), so they gave me a breathalyzer test, and then let me go once they understood they were just bothering a poor person working too many hours.

I was polite throughout the whole interaction, there wasn't much they could do. They weren't nice until it was clear I was just tired and not DUI, but that makes some sense.

Answer me this. These days guys love anal sex right, if you present them with your ass they will happily nail you into the ground. So why do some guys think it's "sissy" to let women stick a finger up their ass?

That's when the policemen spotted me: I was so tired I was unable to park where I found a spot, and just drove to the next one I found. When I left my car, they pulled me over and asked me a bunch of questions (the usual ones, like where I was going, where I was earlier, etc).

Uhm, just as a note: Europe, not US.

I was going back home from my office, around 3 or 4 am. Huge project to hand in, I just kept on going until I had it finished and polished, and when I finally managed to finish I drove back and started looking for a parking spot.

Jonathan Joss, ‘King of the Hill’ and ‘Parks & Recreation’ actor, dead at 59 after shooting - CNN