Having kids did it for me.
The phone call starts off with him ordering me to enable my speaker phone, then drop and do push-ups and sit-ups while simultaneously reciting a poem/pledge/prayer/mantra.. basically any low IQ task for about 2 minutes. Then we spend another 2 minutes chatting. The call is over in 5 minutes but by then I am wide awake.
Works best if your Dad is a former drill sergeant, in a different time-zone, is retired, and doesn't like to talk much. :)
But you might not find it that exciting then, having teenage kids has its own drawbacks.