Viagra has a cousin: On Tuesday, Priligy—a prescription drug meant to help men who suffer from premature ejaculation—will be available in Britain. The drug is said to make men last three times as long by altering their serotonin levels, but those extra minutes won’t come cheaply: It costs well over $100 for just three pills. The pill is already on sale in some European countries and will be sold in Britain exclusively online for private prescriptions only.