There are some morning when I have apparently having a very delightful dream I wake to find the circus has come to my bedroom and set up the big top tent.  Those mornings hands down the most frisky but normally I'm more of a night person.  

25 years ago however it was more 24 hours a day 7 days a week I felt the most frisky  Hell in my teens early 20s I would wake in the middle of the night and have to twist one off just to get back to sleep.  Even married at 22 if she was sleeping I would still do it sometimes If I got lucky she would wake and join in other times she would be like can you go to the guest room your keeping me up.  But she was grumpy to wake just to play with the nibbles rubs etc ...

Unlike the song, I prefer morning. But that would mean either getting out of bed to let someone in (which would kinda spoil it) or someone being there next to me in the am and us both coping with morning breath (mine is as sweet as chocolate covered cherries).

Heck, at my age, when wood comes, it is time...

"I once had a girl, or should I say, she once had me...

That depends on the time of day

Morning - I wake up horny with a woody that will drill a hole in the mattress
Mid Morning - Woody still drilling then off to masturbate at work
Lunch - the thought of eating bring to mind sweet tasting pussy
Midday - a power snooze starting with a woody and waking up with a woody
Dinner - Woody begging to be played with
Late evening - energy to spare and horny as hell

So to answer your question I would say it does not matter what time of the day. The question is can I find one woman to keep up or three.....Hey I can dream