The male psyche gains comfort from company in 'observation' situations. That's why groups of guys go to lap-dancing / table dancing clubs, or strip shows.
I interviewed Linda Lusardi once, and she told me that when she did personal appearences, groups of guys would whoop and leer and shout out suggestive remarks, but when they were allowed back stage one at a time for an autograph, they were all shy and utterly polite!
I don't have the 'dance stimulation' gene, it does nothing for me at all. Back in the 80's, I dated a stripper, and she and her colleagues used to delight in spotting a lone married man (they have a radar for this kind of thing!) and they would tease him, sitting on his knee, blowing in his ear, and just as they stood up, they would blow a previously concealed handful of talcum powder all over him, and watch him desparately trying (and of course failing!) to get it all our of his hair and clothes before he went hom!