yupps, people shut their eyes when kissing/making out... well at least I do! :P ehehehe... it's sorta akward if you're kissing with your eyes open!
usually when you're kissing someone for an extended period of time, or even not... well, your faces are really close together, and most people can't focus at such a distance. however, your eyes will automatically try to focus, and it can become uncomfortable. closing your eyes avoids this
it also helps you focus completely on the kiss (which is a good thing )What are some ways to practise kissing?