Squeezing the testicles and stopping them moving during sex can help to stop ejaculating too soon
, though many men find this uncomfortable or inconvenient. It is generally safe however and testicular restraints can be bought to do the job for you. A penis ring or penis band that can be purchased discreetly from adult shops are to be worn on the base of the penis does the squeezing for you, this is not harmful but some men again, find it uncomfortable.