Among older people, if sex is given up altogether for some months for various reasons such as illness, they can lose interest in it permanently . Masturbation is recommended in such cases . • In America , women retain their interest in sex much longer than men . In the age group of 50 to 90, the overwhelming majority of women give up sexual intercourse only because their husband s are no longer willing or able to have sex. Men , however , give up sex much earlier because of impotence , illness and lack of interest . • It is quite wrong to say that some people are undersexed or over- sexed. Nothing can be further from the truth . These things are only psychological . With rare exception...