Look, if a bloke wants a shag it doesn't mean he wants a relationship. If he has a good shag it might lead to a relationship. But by and large a relationship with a woman is a lot of trouble.

Also, he might quite fancy a shag but be worried about his own body image or lack of practice.

If you (woman) fancy a shag, ask. At least you are unlikely to be accused of sexcrime as a result.