If I may interject an opposing viewpoint...which I fully intend to do, permission or not...the pic of three old dudes getting down made me rather cheerful.
Trust me, all you viral studs out there. The time will come when you look in the mirror for your morning shave and freeze...muttering "Dad???" at your own reflection.
Then hopefully, you'll get to the age where you'll have white hair and be pissed as hell at people who are still surprised you can not only *still* get it up, but want to do so at every available opportunity.
Fuck on, old dudes!