This doesn’t have to be awkward. Yes, you are giving someone, as a 50th birthday gift, something they will use for pooping. It’s OK. Then someday you’ll say, “Hey, you, uh, you ever use that Squatty Potty?” They’ll look horrified for a half a second, but then they’ll crack a quick smile and say, “Yeah, actually. It’s great. Thanks.” Then you never speak of it again.