Ok, Well this is coming from a 16 year old Male, and i have been actively dating for just under 3 years. (like one on one dates during weekends, time actually spent with a person.)

My first story, first girlfriend, dated her for 5 months, 4 months into the relationship we were forbidden to see each other. Did the whole sneaking about thing. in that one month she was constantly trying to do sexual things with me (such as handjobs trying to put my hand in her pants, that whole deal). relationship broke at 5, i wasn't ready and didn't like how it was moving so quickly so suddenly.

had a couple of small monthish (aware not a word) relationships.

started getting serious again with a girl, this was at about 14, 6 months. dating for a while and again was decided i wasn't allowed to see her at all, her parents again unknown reasons. within a month of this, the whole sneaking around thing going on again, she decides she wants to have sex, i say no, she ends up pressuring massively for it, and then she dumped me, since i didn't love her not wanting to have sex....

next relationship ended up failing for various reasons. Now believe sex destroys relationships if you can't handle it....

currents going great

From what I've found in my experiences, when a relationship is forbidden it suddenly becomes a lot more interesting, and female's tend to want more, which i think is more of a rebellious thing.
And also the most enjoyable and healthiest relationships I've been in, Both me and the girl in question, were honest with what we were doing (only if ever specifically asked about it of course..), and felt we didn't need to really hide anything. they also happen to have been the least sexually active relationships, more emotional.

but I'm still only 16, alot more to experience in life yet
take what I've said as you will, just what I've seen.