Are my clowns getting kinky?

I have 2 false percs, bought them at the same time, they were swimming together at the store. They typically never leave each others side in my tank, the bigger one leads the way. Here's my question, seems like every night when just the actinic's are on, the smaller clown will sort of vibrate for a few seconds, usually with it's head straight up towards the surface. He/she does this every few minutes when the bigger(he/she??) clown is near? Are they getting kinky? I've yet to see them lay eggs unfortunately...

So the smaller one is the male, should have figured considering how he follows the female around, it's like their at the mall shopping for shoes or something! So they need to be of adequate age/maturity, general health, and they need a safe, undisturbed area to lay the eggs? I don't know how old they are, but the female(bigger) has started getting a bit darker, while the male(smaller) is still all orange.

P.S. I was watching a program on discovery HD about spawning trout, and the male trout did a similar little vibration up against the female, they say it's to arouse the female, that's what got me thinkin about my clowns.

I gotta feeling that I love NY cup is gonna throw off the decor!!!!, but I get the idea, thanks for the help.