This clip is taken from the Joe Rogan Experience podcast #473 with Jim Jefferies (http://bit.ly/1uBxbIW), also available for download via iTunes & Stitcher (http://bit.ly/1jLpwmU).
http://podcasts.joerogan.net/podcasts/jim-jefferies
http://joerogan.net
Video Source
The female skin is evolution's carbon copy of domestic violence.
Why do people assume that an erection must have a sexual reason? Every single night when he sleep we get between seven to thirteen erections and it's not because we're dreaming of something erotic, it's because it's the body's way of maintaining bloodflow and doing a sort of system check.
Teenagers will also testify to all the times when a spontaneous erection happens out of nowhere without any sexual stimulation of any kind is going on. Also, if you wear tight pants for a long time and then take them off you're extremely likely to get an erection within a minute of taking them off because the floodflow has been slightly cut off and is now functioning properly again; same thing as when dreaming, it's a systemcheck.
And infants that haven't even been born yet have been seen on scans numerous times with a full on stiffy.
A hard on is not purely sexual, more often than not in any man/boys life erections happen for reasons that are not sexual.
You probably know that the hormonal trigger to develop vertebrate embryos/fetuses into males happens quite late and so the body of a male human infant will be flooded with testosterone to continue that initial development right up to about 2 years old.
This is the reason for random baby boners, he's kinda OD-ing off of his own testosterone, it's totally normal and it'll pass.