Single guy only follows rock climbing girls. Is he gay or pervy?

Hey,

So this man is in his 30's and single. He is very good looking but he is kinda nerdy. On his Instagram account he literally only follows women. Most are rock climbers. There are a max of 3 men he follows. He seems like a nice guy and he has a good job.
Is this a red flag? Why does this seem so weird? Is he gay?
Single guy only follows rock climbing girls. Is he gay or pervy?
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