Actually, the BBC creators said that Sherlock was celibate, not asexual.

Okay, I'll bite. How does Sherlock demonstrate, through his actions, not words, that he respects Watson? Drugging your partner without his consent is certainly not respect. Refusing to pick up the goddamn milk the one time you're asked is not respect. Crashing a date your friend has been looking forward to for a long…

Here's one of my issues with BBC Sherlock: how they portray Watson. First episode, he's an active presence in the show- he makes decisions which have a lasting impact and with his comment about Holmes doing those things for kicks, you get the feeling that part of the arc will be how caring about each other steadies…