Thank you for your offer Doctor! Hope all is well with you. I m a flight attendant mostly working across the Atlantic from NYC to Europe on blocks of 12 to 15 days on a row with 24 hours rest at both ends. I read in your column sex is healthy and supports immune system and a good night sleep. Would self masturbation be as healthy? I sleep about 6-7 hours at night and take power naps whenever possible. Are there any other tips from you ?