Lots of ladies enjoy seeing two men go at it. That's the attraction to DP, IMO. It satisfies our "two cocks rubbing against each other" intrigue, and it's not all the way "gay" for the men. I tend to watch bisexual porn, or MFM with MM action.
My hat's off to the dedicated ladies who can fit that much meat inside of their girly bits! No way that is happening for me even if I wanted to, and I am sooo okay with that LOL!
As far as pre-visit preparations, I masturbate but won't let myself cum. By the time the gent arrives, I am in attack mode.