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没有所谓正常

google结果说，research/survey的结论是这个年龄段平均每周2-3次好像

平均这个数字对个体没有意义

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Frequency of sex

Percentage of Women Reporting Frequency of Vaginal Sex, N=2393
Age Group	18-24	25-29	30-39	40-49	50-59	60-69	70+
Single
Not in past year	50.8	43.0	72.3	71.1	85.4	84.5	100.0
A few times per year to monthly	16.4	21.5	10.7	16.9	5.4	6.5	0.0
A few times per month to weekly	19.7	24.1	12.5	9.9	7.0	6.5	0.0
2-3 times per week	8.2	1.3	4.5	2.1	2.2	2.6	0.0
4 or more times per week	4.9	10.1	0.0	0.0	0.0	0.0	0.0
Partnered
Not in past year	12.9	10.6	14.8	20.6	21.1	14.8	30.8
A few times per year to monthly	16.1	11.7	13.6	13.7	18.3	11.1	15.4
A few times per month to weekly	31.2	36.2	43.2	24.5	36.6	48.1	23.1
2-3 times per week	32.3	28.7	18.2	31.4	18.3	18.5	7.7
4 or more times per week	7.5	12.8	10.2	9.8	5.6	7.4	23.1
Married
Not in past year	11.8	3.5	6.5	8.1	22.0	37.9	53.5
A few times per year to monthly	14.7	11.6	16.3	21.7	23.7	20.0	25.4
A few times per month to weekly	14.7	47.7	50.2	46.6	36.2	35.9	18.3
2-3 times per week	35.3	35.2	21.9	20.8	16.9	6.2	1.4
4 or more times per week	23.5	2.0	5.1	2.7	1.1	0.0	1.4