Certain things in life are inherited from the traditions followed since ages without even they being written anywhere but passed on from generations to generations by following and practicing what is deemed right and religious ....Shabarimala Temple visit also not an exception.... Ayappa is celibate so that he can focus on answering the prayers of his devotees. And he will remain celibate till the day any malikappurathamas (first-time girl child devotees) stop coming to Sabarimala. So women aged between 10 and 50 (menstrual age) are not allowed in this shrine .As we know , all over India Hindu ladies during their menstruation period ,normally'll not visit any temple . Without a proper Vrutham it is a sacrilege to visit the temple or climb the Holy 18 Steps of Shabarimala (The 18 Steps cannot be climbed if you are not carrying an `Irumudi Kettu').A devotee aspiring for a darshan of Lord Ayyappan has to be pure both mentally and physically and for this, he is expected to observe
‘आसिन्धु सिन्धुपर्यन्ता यस्य भारत भूमिका. पितृभू: पुण्यभूश्चैव स वै हिन्दुरितीस्मृतः’ अर्थात – समुद्र से हिमालय तक भारत भूमि जिसकी पितृभूमि है जिसके पूर्वज यहीं पैदा हुए हैं व यही पुण्य भमिू है, जिसके तीर्थ भारत भूमि में ही हैं, वही हिन्दू है… A Hindu is a person who regards this land of Bharatavarsha, from the Indus to the seas as his Fatherland as well as his holy land, that is the cradle land of his religion.