"Some" cultures are pretty touchy on sexuality, but others are not (confer contemporary US and Japan). In the US, to my knowledge, it is illegal to, for instance, take a photo (with cam or video) of a nude child while in Finland, all people many times go to sauna together naked until their teens, sometimes beyond. Since Hypno hails from Estonia, and Estonia may be the most American country in Europe, I understand that sex may get offensive.
However, interestingly enough, there are repetitive allusions to sex in X Japan's lyrics.
Disallowing or banning sexual material and allusions to sex would be like banning the Sermon on the Mount on a Christian forum. It is logically absurd, really. I don't believe the spirit of X is close to Disney or Pat Robertson. I thus think a bit more "anarchistic" as well as artistic approach would be more faithful to the concept of X without condoning to conservative ethics. "Cleansing up" the concept of X only strikes me as an effort to make X more "US-friendly". For an interesting comparison, one may look at the latest Zelda on Wii where the characters practically live in America in terms of rhetoric and ideology.