My mother knows I'm gay, but she also knows I've never been in a relationship, so she probably assumes I've done nothing, anally speaking.
In any case, I've never told anyone I currently know in person about my affinity for anal play. I don't think anyone would want to know such a thing about me, anyhow.
However, I just envisioned a funny scenario. Picture it, Tantus A-Bomb in plain sight, discovered by friend or family member.
"W...What is this?", they say, with a hint of alarm and suspicion.
1) "It's... A football! A really small football! I secretly like sports! Please don't tell anyone."
2) "Oh no, a bombshell! Run and take cover!"
3) "Oh, that? I really like sticking it in my butt."
Most people I know would be more likely to believe the first two responses, coming from me.