Consider Julie. That's what Dave was doing right then as she walked down the front path towards his door.
Julie had auburn hair (closer to red in Dave's opinion, but she call it auburn), green eyes, creamy skin, and a very nice figure. She was intelligent and vivacious, fit and popular.
She is eighteen, with an over-protective mother. Father, too, for that matter, but her mother is ferocious.
Dave had known her for years. His daughter, Susan, dragged her home from school one day and said "this's Julie" and from that time on she seemed to have free run of the house.
Effectively, Dave had always treated her like another daughter. Made her clean up any messes she made when at his place, watched her grow, leaned on her a little when he thought it necessary.
When she was fourteen and was developing nicely she couldn't resist the temptation to show off her new attributes. She 'accidently' lost her bikini top in the kitchen, squealing and nearly covering herself with her hands. Dave showed his appreciation by spanking her and reading her the riot act. She didn't speak to him for a month after that. (Neither did Susan.)
When she was sixteen she tried out her flirtatious style on him, much to his amusement. Flirting was OK, but she was always careful to keep her hidden attributes hidden. Not that she didn't manage to nearly show things, but all girls seem to have those tricks.
Once she turned seventeen her flirtations were directed at boys her own age, much to Dave's relief, because she was turning into quite a charmer.
Now, at eighteen, she was quite the young lady. Dave had no idea if she was sexually active and, quite frankly, considered it was none of his business.
The day he was observing her walking towards his front door was a Saturday in early summer. It was shaping up to be a really fine day and for once Dave hadn't slept in, but had risen with the larks. That early rising explains why he was up and about at seven in the morning on a weekend.
It did not explain why Julie had apparently risen so early that she was out visiting people at seven in the morning. She was dressed in tights and what looked like a combination t-shirt/dress, with the top barely covering her behind, which explained the tights on what was going to be a hot day.
The front door was open as it wasn't too hot yet and Dave liked the breeze. Julie waltzed straight in with a casual wave to him.
Dave was just making himself some coffee and he indicated Julie should sit while he poured her some.
She sat drinking it and chatting about nothing in particular.
"You're up and about rather early this morning," Dave observed, and immediately became suspicious when she blushed faintly and airily waved the matter aside. Dave wondered if he should pursue the matter but decided not to, she was officially an adult now.
Julie had just finished her coffee and was putting her cup in the sink when her phone rang. It was her mother, checking to see how she was and what she was doing. Dave's suspicions got up from where he'd dropped them and kicked him sharply in the rear. Even her mother wouldn't ring her to check on her if she'd only just left home.
"...had a quiet night, mum" she was saying. "We mainly watched TV and played music. Ah, no, Susan is still asleep and I'd rather not wake her. Mr. Wilson is up though if you'd like to talk to him."
Without any more warning than that she passed Dave the phone. He gave her a look that promised some sort of retribution, and took it.
"Morning, Michelle," Dave said. "Is there something you need?"
"No, no," twittered Michelle. "I'm just checking to see how she went overnight. I always worry when she stays at a friend's place, you know. She wasn't a problem at all?"
"No problem," Dave assured her. "Why, I hardly knew she was here. And you know she always behaves at my place. She's worried that I'll spank her if she causes me any problems."
The last was said with a significant look at Julie, and it probably would have ended there with the threat if Julie hadn't smirked and deliberately twitched her bottom at him.
Dave swapped a few more inconsequential nothings with Michelle and then passed the phone back to Julie. Knowing Michelle, she would chatter away for another ten minutes while Julie adroitly soothed her nerves and said nothing.
Dave settled himself comfortably again and waited until Julie came pacing past him, soothing her mother's worries. When she was in the right position he just took hold of her arm jerked her towards him, having her bent over his knee before she knew what was happening.
Julie gave a squeak and twisted to give Dave a look of laughing indignation. She was trying to scramble back to her feet while she assured her mother that the squeak had been caused by nearly dropping the phone.
With one hand firmly on the small of her back, Julie couldn't get back up, and the next look held a certain amount of irritation. That irritation, Dave thought, would increase very quickly.
Dave pushed Julie's dress or top or whatever you call it up to her waist and then proceeded to pull down her tights and panties. Not all the way down. Just to mid-thigh, but that left Julie with a bare bottom pointing towards the sky.