The Waterfall - The 20 most romantic sex positions - Now you're going to need a bit of balance for this position but we promise that extra effort is. Sex position #18 - Waterfall. Kamasutra. A cocktail of gentle touches, passionate kisses, burning eyes and unsatisfied desires, you need to drink. The Waterfall takes the woman-on-tip to the edge of the bed for a very high risque sex position! - Top sex positions: The Waterfall.