Maybe you're reading cause and effect into two things that separately come from the same cause. 16 is a good year for a lot of people and because you're growing up, you feel more in charge of your world and more upbeat and all. Maybe you are feeling more fun and full of life in general. If one thing that happens as a result of growing up and feeling more upbeat is losing one's virginity, that's not entirely surprising. :)
I think this is good - you are growing up!! 16 - still a long way to go, hopefully all will work out well for you in the journey of life!! :-)
I t would be interesting to read the comments on your post from community members.