So you’re seeing someone new and don’t quite want to let them go all the way. A perfectly fine way to have some fun without going all the way is non penetrative sex. Some guys into tits love a good titty fuck, others will enjoy a good pussy rub with their hard cocks, and if they are good at it, they can absolutely make their ladies cum from that. The right pressure on the clit and the right pace, it can actually make you cum better than having a cock inside of you, since many times there’s no direct clitoral stimulation from penetration.
Intercourse is not the all end all, there’s many different ways to pleasurably experience orgasm, and non penetrative sex is one of them. Some will only ever be pleased with penetration, but for some, as long as they get to have an orgasm, that’s all they are concerned about and they don’t actually need penetration for that to be achieved. The visual for guys is usually very important, and being able to watch the motions is going to be a big part of the pleasure for the guys. They can certainly be very physically aroused from visuals alone and be able to cum with very little actual stimulation.
One boyfriend I used to have loved to tease and tease before giving me his cock, and he’d let me cum with the non penetrative cock on my pussy before fucking. He used to call it “hot dog and bun”. “Let’s play hot dog and bun!”, he’d say. It sounded ridiculous, but was honestly always a lot of fun and I never turned him down. It usually ended up with full on sex, but once in a while it was enough to satisfy if too tired to have full on sex.