I agree. I strayed from the subject. You're right. Your friend is more important than your little sister . There's no reason for him not to give you a "heads up." . Kick his ass . Disclaimer (lawyer-type jargon) : ClutchFans.net is not responsible for any injuries or lacerations or profuse bleeding or loss of limbs from the result of ass-kickings Franchise3 suffers due to his advice-requesting thread and SwoLy-D's suggestions.
My sister is two years younger than me. Her only two bfs ever have been my really good friends. The first was for 5 years, the current one more than a year. You guys are all saying I should kick their ass becaaaaause I won't have to worry about who she's dating and if he's a douche and she can make her own decisions anyway? Oh, and I made out with one of her friends one time. OK, twice. It's all good. Neither of them asked me first, either. In fact, both kind of hid the fact. My reaction? "...Oh. Good for them." To be fair I did flick the current one in the balls while I was really drunk. The first guy hadn't gotten over her yet so naturally I felt bad for him.
I do feel pretty much like you. Since I'm close to my sister and we hang out a lot together and with some of the same mutual friends, I'd prefer her to be dating someone cool that I could get along with, which one of my friends would fulfill. However, a lot of guys do get angry with their friends dating their sister, and if it does happen it can ruin their friendship. That's where I think the heads up thing comes from, you want to make sure that making a move on your friend's sister isn't going to cause any problems with you friendship. I guess I just feel a little disrespected by not having that courtesy extended to me, especially when I would do it if our situations were reversed.
There is an unwritten rule of asking permission...well, not really permission, but more of letting him know what's cool and not cool... Personally, I would kick his as and tell him to stop bugging your sister... On another topic, what if he asked your mom out...Would you kick his ass then?
Isn't it weirder just to be thinking about your sister having sex in the first place? As a rule I don't. I just... don't. Why would I unless... ew? Everyones someone's sister right, or mother or daughter? Unless she's an only child but that's beside the point. Is it more honorable (if that's what we're really talking about) to have them dating random dudes who might ONLY be in it for dishonorable intentions? How much control should we have? Where do we draw the line? Chaperones? Female castration? Sex is not that big of a deal as long as it doesn't lead to babies or disease. To be fair I would ask before I dated a friend's sister and would prefer to be asked in turn but it's not something I'd pretend to be all Tony Montana about. Look how that situation ended up. What are we, the Middle East here?