Oh, Maker. Maybe it was the alcohol making her more immature than usual, but Hawke couldn't help but laugh. Sure, the mental image was terrible, but combined with Merrill's (rather impressive, in her opinion) impression of her... okay, this world was making up for being crap earlier.
"Do I even want to know?" she managed to get out, once she'd got her laughter mostly back under control. "I mean... that image just..." And she was back to giggling. For a Hero, she really never did well on the maturity front.