I have been doing home workout routine of 100 Decline push ups and 50 diamond push ups. I have been wearing a Langot (loin Cloth) to cover my testicles from any harm since I stared working out 10 years ago. So my question is do I need to wear the Langot even for my home push up work out? I want to stop wearing it. Will it harm my testicles if I do push ups without a Langot at home?
Getting one's testicles in the way during pushups sounds like a problem that is exclusive to those who are particularly blessed with tremendous balls. Or cursed with extremely sensitive ones.
No, there is generally no problem with not wearing a loin cloth during pushups. In fact, I've never even heard of a single person needing to do so.
But the test is very simple. If your testicles hurt during pushups without a langot, but not while you're wearing one; put it back on.
As per Alec's answer, it is unlike that you need this particular form of loincloth. In its traditional format, it is meant to prevent a hernia, or hydrocele, i.e. fluid build-up in the testicles. Push-ups are highly unlikely to introduce this level of strain. You may wish to wear more protective garments such as a traditional loincloth or a weightlifting belt if you move on to lifting more than mere bodyweight.