Sex without chemistry is like eating a bunch of pieces of white bread for lunch: you're just doing it to satiate a physiological response, but the act isn't exactly pleasurable.2. Really feeling like your partner cares about your pleasure. If they act like they aren't getting anything out of it, that's an immediate boner-killer.
It suggested the lava had swept from west to east in two waves - travelling about one kilometre (0.62 miles) per day.Professor Michael Skrutskie, of Virginia University, said: 'There was so much infrared light available we could slice the observations into one-eighth-second intervals during which the edge of Europa advanced only a few kilometers across Io's surface.'Loki was covered from one direction but revealed from another - just the arrangement needed to make a real map of the distribution of warm surface within the patera.'These observations gave the astronomers a two-dimensional thermal map of Loki Patera with a resolution better than 10 kilometres (6.25 miles), 10 times better than normally possible.They showed the overturning started at different times on two sides of a cool island in the centre of the lake that has been there ever since Voyager photographed it in 1979.Lava lakes like Loki Patera overturn because the cooling surface crust slowly thickens until it becomes denser than the underlying magma and sinks, pulling nearby crust with it in a wave that propagates across the surface.Prof de Pater said as the crust breaks apart magma may spurt up as fire fountains similar to what is seen in lava lakes on Earth - but on a smaller scale.