Sleep or have sex with her? Either - she would be safe if she needed it, or I would try to make her first experience fulfilling and exciting.

I prefer a blow job because, as one sexy lady commented, she can control the orgasm. Nothing like a woman who will take her time, edge me and make me wait, teasing all the time. Maybe stop just as I am about to come and make me eat her to orgasm and then continue with her blow job. Sweet.
Having had some lesbians as personal friends, I think they and many bisexual women might prefer women for several reasons. Women are more sensual, more patient, especially when it comes to foreplay. Hot and heavy rough sex is fine with some women and sometimes, but especially when it comes to oral sex, women have the skill to do it best because they know what feels good, etc. without having to direct their partner or give instructions. My lesbian friends say men are goo eager to get a woman off so hey can get off as well. I also think that lesbians are more loyal, faithful than most men, except married men.
I've experienced a lot of things, including sex with two girls, which is the ULTIMATE sex experience. But something I would like to try is to drink the urine from a woman all day, or perhaps from two women, to see how much I could actually consume without getting sick. I've had it weak and strong but never more than I could consume. I know that's disgusting but it's a fantasy at my age.
Since my first wife would not let me cum in her mouth, and out of curiosity, I tried tasting my own cum at home once and did NOT like it. BUT....years later when a woman was dominating me (I was restrained) she sat on my face and made me eat it out of her and, well, under those circumstances, it was tolerable. Bu/t I have no need to try eating it from another guy.
If I were a young guy, I'd like to kiss and make out with you because you're cute and sexy. But you wouldn't want to make out with a guy old enough to be your grandpa, so realistically from a fantasy standpoint, I'd "taste" you until you had an orgasm or two and then I'd flip you over and lick your butt until you giggled.
There once was a writer named Will
Eating pussy, he could not get his fill,
He said "I could still get my kicks,
If only between licks,
it came it the form of a pill."
A woman said to the man below,
There's something I want you to know,
Let's pretend it's a race,
While I sit on your face,
Don't stop until it's win, place and show.
There was a man from Deluth,
Who didn't mean to be uncouth,
But he, said, being blunt,
"When I drink from a cunt,
It's better than expensive vermouth."
The young girl, lacking any class,
Made a statement bold as brass,
Sucking my cock she swore
She'd never done it before,
And I laughed heartily into her ass.
I've heard some women say they can come if a man spends enough time and knows how to suck her tits but I've never been good enough at it to make a woman come. But when it comes to eating pussy or ass, I put that in body worship category because I will do either for hours. I like to make a woman come giving her oral pleasure. A pussy is too delicious to abandon until she pushes me away or passes out. Her ass is too tempting, too naughty not go get in there and give it a good rimming. You can't rush eating a pussy or ass.
Took my girlfriend to FL to the beach and the first half hour in the hotel room she was so horny we did it on the floor in the huge walk in closet. Again in the shower after we came back from the beach. It was also the first time, that night she had ever sat on a guy's face and had an orgasm. It's wasn't her last time.....
Had a blind date with a young Latina and she thought I was too old for her, but we had such a good time at dinner that she let me take her home and did a 69 with me. She was impressed with how long I lasted because she knew what she was doing. I was impressed with how long I lasted for the same reason but she was so hot I wanted to keep licking her forever!!!!