推荐回答（2个）
男人天生不喜欢被套住，无论感情也好，性爱也好。或许正是因为这种潜意识，才会对安全套的使用太随意，以至于闹出各种啼笑皆非的事情来。日前，美国印第安纳大学性健康研究工作小组完成的一项研究发现，有21%的受访男性觉得安全套太紧，18%觉得太短，10%觉得太松，还有7%觉得太长。总体看来，近六成男人用错了安全套。对此，中山大学附属第三医院不育与性医学科副主任医师陈俊表示，用"套"有技巧，男人须谨慎。
1、性爱做到一半才戴套
你惨了，那个你不想要的娃娃可能正在孕育中。医生说，没有射精不代表不"漏精",只要性兴奋了，爱液里就可能存在少量精子。在没有屏障的情况下，怀孕轻而易举。如果你或性伴侣有性传播疾病，随时还会受到感染。所以，肌肤接触之前，要先戴套哦。
2、阴茎疲软的时候戴套
阴茎没有充分勃起，安全套就算戴上了也不"贴身",随便动几下就会脱落，这样戴了和没戴差不多。
3、把套展开了再戴
正确的戴法不宜事先展开避孕套，而应在阴茎勃起后自龟头部分顺势展开。避孕失败，和这不无关系。
4、拿出套就戴
一般人都是这么用，可问题是套套顶端的小气囊内有空气，在阴道里遇热膨胀，会导致射精后精液向阴茎根部溢出，可不保险哦！医生说，戴套要先把套套前面的"小球"捏瘪，让空气排出，才能达到有效避孕的目的。
5、戴套不看型号
太紧，太松，太长，太短，如果你觉得戴套总是有这样那样的不满意，或许要看看是否选错型号了。中国男人一般都用中号，可适不适合你，还得试试才知道。总之，套套一定要在充分勃起时戴，才能"量体裁衣",大小适中。
食品过期变质，套套过期失效。不想搞出"人命",用套前务必先看看保质期。医生说，过期的避孕套已经变质，容易破裂，不宜使用。
7、就戴超薄的套
套套越薄用起来越刺激，但持久度却不佳。你要是个"快男"（即快速射精男），最好还是选稍厚一点的安全套，免得"性致"勃勃却戛然而止，徒添烦恼。
8、疲软后才取套
很多男人喜欢射精以后等"那话儿"软了再把套摘下，这么一来，精子也容易漏出，导致意外怀孕。医生说，射精后应在阴茎疲软前用手指按住避孕套底部一起抽出，取下避孕套时不可让精液流出。
老人、频繁做爱的人很喜欢这种配合。可凡士林会导致安全套的脆性增加，在性生活中容易破损，造成避孕失败。医生推荐，选用水溶性润滑液最合适。
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