Pretty simple idea. While on a plane have an old couple get up and go into the bathroom together. They can be really loud and stuff saying things like "I dont think I can do that position anymore. My plastic hip cant take it" "Thank God for Viagra" "Thank for menopause. Now I can bust my nut in you honey" or "Why didnt you change your depends?" "Well I'm getting old, It just comes out some times and I dont know it" or "Did you bring the lube? You're not exactly like the niagara falls down there anymore" Then can make some loud mouning sounds and stuff then they can walks out with their hair messed up and their pants dropped and stuff. Maybe the old guy can still have a bonner ha.