.. and if they produce images / vids of themselves doing such a thing inn those 2 years then they can be accused under various pr0n laws. A 16 y/o taking an unclothed slefie & sending it to their 16 yo partner commits an offence in UK, but no offence if partner sees them "in the flesh" so to speak.
Deranged laws.
Lots of old copies of the (insert your description of choice) SUN now illegal pr0n e.g. 16 yo Sam Fox unclothed chest on display