In my long (28 years) career as a specialist in therapy for gay men, and my relatively recent emphasis on sex therapy for gay men, perhaps the most common complaint I hear from my clients is about erectile dysfunction, which is really just the ability for a (cisgender) man to get “hard” and stay that way enough to enjoy a full cycle of either oral or anal intercourse.
Erectile dysfunction in gay men is not limited to older men. Gay Men’s Sexuality: Three Types of Erectile Dysfunction and Their Interventions