Picked up on this from another thread. Growing older...having more itme to experiment while having sex...also seems to expand one's mind or (perhaps) de-sensitize our sensibilities when it comes to trying something new. If a man in his teens or early 20's was confronted with a women holding his ucm in her mouth he'd likely cringe and run if she tried to kiss him. If a young(er) woman was requested by a man her age to "feed him back his cum" she'd likely respond "Why...you gay?" rather than see it as a chance to try something new.
I relish having grown old enough to appreciate variety and any opportunity to expand my realm of experiences. It's made life much more interesting!