An erection is a naturally occurring physical trait in men. 
The average man has about 11 erections each day and several more at night. But these erections don't always happen because a man is sexually excited. Sometimes, there is no sexual stimulus at all. 
Grabbing women by the pussy is the act of a predator. [url]http://www.sexhealthmatters.org/did-you-know/male-erection-frequency[\url]
Grabbing women by the pussy is something a jerk or a predator says. 
/thread
What gives a grown man an erection on his campaign plane?  Any normal person would hide it.  Obama, flaunted for all the women on the plane to see.
If a business CEO did this in front of his employees, he would be fired for sexual harassment