I work on bikes and cars so much that I got tired of spending 15 minutes trying to get all the grease and oil from under my nails and creases. I'd still feel an oily film later on, which meant I couldn't touch my lady wherever I/she wanted. To add to that, having to scrub grease and oil off a cut sucks.
Good rubber gloves are a huge help in not having to deal with all those issues, and it saves time. A worthy investment.