Because dads don't always think like moms.
Many couples fear that too much sex may reduce their chances of conceiving a baby. The basis for this fear is the belief that the man should conserve his ejaculate until the actual time of his spouse’s ovulation.
However, this fear is unfounded and there is no scientific basis to support it. It is simply not true that less sex increases the chances of successful conception. In fact, excessive concern with timing intercourse to match ovulation may actually be counter productive.
These are the facts regarding sex and ovulation: