Gemini is clever enough to counter Aries's need to dominate. Gemini may seek extra stimulation, but is discreet about it. Aries is likely to be the leader sexually, and Gemini delights in thinking up variations to keep Aries's interest at a peak. The signals are definitely go. These two are fascinated with each other at the beginning, but sexual attraction fades in the face of many temperamental differences.
Resentments build up and they argue over trifles.
Aries has a sharp tongue that wounds vulnerable Cancer. The more aggressive Aries is, the more defensive Cancer becomes. There's too little compatibility to work with. When Cancer starts to nag, Aries looks for the way out. Both have got egos to burn and both like to lead.