Complex sentence: However, there are some adaptive problems in short-term mating that men must solve; one of these is avoiding commitment and women who might not have sex with the male until they have a signal of commitment or investment.
Split into simpler sentences: However, there are some adaptive problems in short-term mating that men must solve. One of these problems is avoiding commitment and women who might not have sex with the male until they have a signal of commitment or investment.