The article doesn't mention the reason for this strictness: proclaiming to be gay is/was a popular method of actually straight draft dodgers/avoiders, so the army started to ask for proofs.
If draft and barring homosexuals wasn't wrong to being with, and if it wasn't so humiliating, it'd be funny. Apparently the Turkish army now has one of the biggest collections of amateur gay porn ever. IIRC there is even a small business niche for gay men to play the partner in such proof videos.