Was it necessary that the second post was anonymous?
Age is a factor I guess, but if you intend to sleep with him in a couple of months any, the only effect age will have on the replies is "don't do it, you're too young", so it may not achieve much!
Basically do whatever you're comfortable doing. Intimate doesn't have to always mean sexual; are you just doing all this (including the sex) to "show him how much you love him"? Because there are non-physical ways of doing that too. If that is your only motive, it might be worth considering some other things you can do and let the physical side develop on its own; sex should be a product of a good relationship, not the basis of it.