What does it mean when my boyfriend says this...?

so me and my bf have been dating for almost 2 months. ahaha not alot i know.. but anyways hes a really sweet guy and is really shy and quiet but for he past two days hes acting like different.. he was being super ual and horny i wud put it.. and i said WOAH dis does not sound like yu haha and he said STOP acting like a baby.... and i was like wow! i just said it doesnt sound like yu... and he says lol sorry im just really in the mood today ;) and i was like uhmm...i dont get him?