i think a healthy sex life is very important,we are only human,having sex and sexual desires,if there is no sexual intimacy i believe in time one will seek it elsewhere,I know I do,thats why I only date girls who are have a good sex drive and understand that I need it quite a bit to keep me happy.
Ron white said it best "im a good dog but ya gotta pet me every now and then to keep me under the porch" he also said "if your not going sleep with me im gonna sleep with someone else,I know Ive saw me do it"
just my opinion,i guess old people dont need sex much but im not old