Heapmomma,
Wow no wonder you were nervous about confronting him. I too think his responses are odd.
What could he possibly think is funny about wanting a sex life within your marriage? Have you two really grown that far apart that he wouldn't even consider the possibility that you were serious?

I sooooooooo admire you for doing this. In reading the convo, I was amazed at your poise and balls. (how's that for eloquence, LOL!)
It couldn't have been easy. Believe me, if I were to recount my very first "I need sex" convo with H, you would see nothing but bawling on my end and massive confusion on his. You rock, sister!

Congrats and like the others said, be prepared to bring this up again and soon. He will try to blow it off as some "weird mood" you were in or some nonsense like that. Stand your ground; you have everything to gain!

Good job, momma.