On the trail of girls

It is interesting... there is some kind of male that is the casual stalker. They pick upon a random girl or bunch of girls, and follow them for a while just to see where they are going. It might be difficult to understand why such an indulgence is necessary, but if you happen to be the kind of guy girls try to stay away from, this kind of a pursuit is oddly gratifying in some way. Maybe it was four years ago that two guys came behind us - a group of four girls and two boys, coming home after watching a movie. These two followed us all the way from the movie theatre, across the road, through a subway, and almost till the bus stop from which we were about to catch the bus when the girls decided something must be done about it. So my friend and I went over to the two of them, both hefty midgets with clothes that looked like they had come from Fashion Street, and we were good enough to politely ask them what they were up to. Apparently, they just wanted to have a word. One of them cheekily waved to the girls over my shoulder. They were apparently from the merchant navy, back for just a day, and all they wanted to do was talk. Now if they really were from the merchant navy, and deprived of girls, they might go and become homos for all I cared, but neither of us bought their story, and asked them not to follow us. They went away, but not before apologizing heavily to the girls, while keeping a distance. This was the part we felt weird, and didn't think too much about it, and went on our way.
Around a week ago, an interesting development occurred... two boys followed two girls just to see where they were going, but I was caught on the wrong side. There is this local shopping center which is apparently a hot spot for chicks, and I had no clue that guys from a large radius flocked to the place just to get a glimpse of girls coming out of a Junior College or hanging out at the shopping center. Now this might be disgusting to a lot of people, but it is a common occurrence, and that is no justification for what is about to follow.
A casual acquaintance of mine decided to take me to the Shopping Center to "check out" what he called "his girl". I was under the assumption that I would get to meet his girlfriend, and I thought what the hell, I had nothing better to do with my time, and decided to tag along. I have no clue how he managed to have his timing so accurate, for we had hardly entered the shopping arcade, when three girls and a boy walked in the opposite direction. He immediately turned around, and said "That's her" and started to follow the group, out of the Arcade. The group hung around at the parking lot, exchanging goodbyes, when one girl headed back in, the guy went another way, and the two remaining girls headed over to a shop on the opposite side of the road to get some cold drinks. My friend happened to be a smart-ass, and in this business for a long time, he called the guy as he went past us, and questioned him about the girl's name, and where she studied etc...
I was shocked out of my fucking wits, but remained neutral, just to see where all this was headed. Now the surprising thing is, this friend of the girl, totally co-operated. He told us her name, and other details - the only one that grabbed both our attentions was that she was single. I looked at her. She was a kid. I looked back at her friend, and we exchanged one of those looks where each scrutinizes the other, and masks the conclusions. He went his own way, smiling at my friend.
I just realised what had happened. There was no particular girl that my friend set out to meet in the first place, he just picked out one he "liked" at random, or by some own logic of his, if not random, and decided to follow her.
The two girls finished their drinks, and began walking down the road. I asked him if we were going to follow them, and I knew right then, that there was no question about it. I refused, right then, which put him in despair. He wanted me to come along, and this was his logic - If she saw me with him, she would know that he was a good guy because he had decent friends. Now this was a little flattering, so I decided to follow him, but ensure that he would not do anything weird. There was no disgust, there was curiosity about what my friend was really up to, so I decided that it would be an experience, and went along.
We followed her down the road, around a corner, up towards a bus stop, where I hoped she would catch a bus and leave. She didn't, and we walked on after that. My friend was contemplating out aloud whether or not she was headed home, and I barely listened to him - chasing a girl like this, gave him some kind of a kick. I was pretty sure he didn't have the balls to talk to her at any point of his life, and after today, he would forget all about her, but for that stretch of the road that he followed her, I was sure that she was being violated in some way. I pointed this out to him, and he said something like "What wrong are we doing? If she asks anything, I will speak to her rudely, deny that I am following her, and ask her to mind her own business"
Wow. That was exactly what I thought. That was just some logic too hard for me to comprehend, so I did not try to understand. I went along with him, enjoying him as much as he was enjoying her, and I think in much the same way. I was curious about his next move. She got into a housing colony. We went in behind her, he started wondering if she lived there, or would go through it to the other end. She walked right through, and I realised that we would have to walk a long way back, but I continued anyway. She did go through the other end, and entered another housing colony, where she turned in to her building. Now things were going too far. I took my friend away by offering him the bribe of a cigarette, which he gladly accepted. I felt a little used, but I didn't care too much about that. He had enough for a day - and this encounter, had actually satisfied him in some way. All of this was a week ago, and I had forgotten all about it till today.
Like wtf?