wow! i must be as dense* as hollow brick to not pick up that paedophilic connotations though i did notice the homosexuality bit.
One of Sakura's friends -- a girl, ten years old, just like she is -- is in a relationship with a teacher of theirs. (That's ten-years-old girl and a twenty-something man. They go on dates.) Kaho, formerly in a relationship with Sakura's big brother, is in a relationship with Eriol. (Sure, Eriol's Clow reincarnated, but he's also in the body of a ten-years-old. Kaho is over twenty, considering that she's a teacher.)
Homosexuality: Tomoyo likes Sakura; Yukito likes Touya; Yue is arguably in love with Clow (although, since Ruby Moon's gender is uncertain, Yue's probably is, as well. He appears male, though); Tomoyo's mother was very possessive of Nadeshiko. Cross-dressing: Ruby Moon... well, Ruby Moon's gender is questionable, but it acts like a girl and Spinel Sun asks at one point why it doesn't wear a boy's uniform to school. (Ruby Moon's response is along the line of "But the girl's uniform looks so much prettier and suits me so much more!") Oh, and Touya is apparently bisexual, since he used to like Kaho.
Get used to it; most, if not all, of CLAMP's works have weird elements like these. CCS is positively tame. (Hey, no necrophilia. No overtly suggestive sexuality.) CCS isn't my favourite, though -- it's way too fluffy. I prefer X and Tokyo Babylon so much more.