ABOUT 80% of married men face erectile dysfunction five years into their marriage because of having a single sex partner, China Press reported yesterday. It quoted Singapore’s Dr Yu Wei Siang, who is otherwise known as Doctor Love, as saying that 50% of men faced the problem with their sex partner after being married for between three and five years and 80% of them after being married for five years. The paper said it was normal for a married couple to experience low libido after having the same partner for a long period of time.