Sexual Health Men :: 42 And Having Wet Dreams?

I'm a 42 year old guy, have a skinny build but healthy and young looking for my age.

Every so often, about once every 2-3 months or even twice a month, I have a wet dream or nocturnal emission during sleep. These are usually accompanied by a sexual dream and I always ejaculate in my sleep then wake up soiling my pyjamas. I had my first nocturnal emission when I was almost 16 although the frequency was greater then than what it is now. I don't really mind having wet dreams and apart from making a mess I actually quite enjoy them, but are they still normal in men my age as I thought that usually these episodes petered out after the mid-late 20s or so? I also sometimes have erections in the early hours (morning wood) but have heard that this occurs with guys of all ages. I am free of any STD's etc. as I am very much still a sexual virgin, but I masturbate probably around once a week. Would these things make a difference to me having nocturnal emissions or the frequency of them occurring? Thanks for reading but I just wanted reassurance that I am still sexually healthy!