Should I feel uncomfortable or upset that my boyfriend says things in his sleep?

Serious answers only.

I'm awake at night longer than he is, and last night I heard him say, "If he can find an ass like that."
Then just now tonight, he was mentioning about a, "pretty little mouth".
I think I'm overreacting because he can't really control his dreams unless he Lucid dreams, but he doesn't do that. Should I mention anything? Thanks. :/