The kiss is the sample of what sex with them will be like. Boring, sloppy, wet, gooey, not passionate, too much tongue… that’s a simple version of how good or bad the rest of their sexual moves will be like. If it’s not great, don’t sleep with them. Or driven, firm, seductive, passionate, teasing, soft, bounding, turns you on then you are likely to be heading in the right direction. Don’t take it further if it’s not.