The Feres doctrine (Feres v. United States (1950) 340 U.S. 135, 146) which holds that the Government is not liable under the [FTCA] for injuries to servicemen where the injuries arise out of or are in the course of activity incident to military service does not immunize a general or the Government from liability for the general’s alleged sexual assault upon plaintiff, a servicemember, since no military purpose could conceivably served by such an assault.